Spain’s weather warning system is operated by AEMET — the Agencia Estatal de Meteorología (State Meteorological Agency) — using a four-colour traffic-light scale (green, yellow, orange, red) under the national Meteoalerta plan, providing alerts for all 17 autonomous communities, 50 provinces, and 326 comarcas up to 72 hours in advance for nine categories of adverse weather: rainfall, storms, wind, snow, coastal phenomena, fog, extreme temperatures (heat and cold), avalanche risk, and fire risk. The system was brought into sharper international focus following the catastrophic DANA floods of 29 October 2024, in which more than 237 people died across eastern Spain — primarily in Valencia — after one of the deadliest natural disasters in modern Spanish history unfolded despite red-level warnings having been issued from early that morning. Spain’s diverse geography — from the snow-capped Pyrenees and Sierra Nevada to the arid interior plateaus, Mediterranean coastline, Atlantic-facing north-west, and the subtropical Canary Islands — means weather warnings are issued year-round and for dramatically different phenomena depending on region and season. This complete guide covers the full AEMET colour-code system in detail, every warning category with its specific thresholds, how to access live alerts as a tourist or resident, the Meteoalerta plan, the 2024 Valencia DANA disaster and its consequences for Spain’s warning infrastructure, seasonal weather risks by region, what to do during each warning level, practical resources for checking alerts, and a comprehensive FAQ covering every key question about weather warnings in Spain.
AEMET and the Meteoalerta System
Spain’s National Weather Agency
AEMET — the Agencia Estatal de Meteorología — is Spain’s official state meteorological agency, operating under the Ministry for Ecological Transition and the Demographic Challenge. It was established in its current form in 2008, succeeding the Instituto Nacional de Meteorología (INM) which had been Spain’s meteorological authority since 1887. AEMET is headquartered in Madrid (Calle Leonardo Prieto Castro 8, Universidad Complutense campus) and operates a network of over 900 automatic weather stations, 13 radiosonde stations, 15 Doppler radar installations, and satellites feeding continuous data into its forecasting systems. It employs approximately 1,200 meteorologists, technicians, and support staff across central headquarters and 17 delegations covering each autonomous community.
The Meteoalerta plan — the National Plan for the Forecast and Monitoring of Adverse Meteorological Phenomena — is AEMET’s formal framework for issuing weather warnings to the Spanish population and to Civil Protection authorities. Meteoalerta was designed to provide the most detailed and current information possible on adverse atmospheric phenomena expected within the next 72 hours and to maintain continuous updates once those phenomena have begun developing. The plan defines nine categories of adverse weather phenomenon, establishes the specific meteorological thresholds that trigger each warning level within each category, and sets out the communication protocols through which alerts reach Civil Protection Units, emergency services, and the public. AEMET transmits warnings to the Civil Protection Units of affected regions, and it is then the responsibility of each regional authority to decide how and when to communicate those alerts to their population — a division of responsibility that became the subject of intense political controversy following the October 2024 Valencia floods.
The AEMET interactive warning map — available at aemet.es/en/eltiempo/prediccion/avisos — shows the current warning status for the entire Peninsula and Balearic Islands and for the Canary Islands, colour-coded by province and updated continuously. The map allows users to click on any region to see the specific warning details: the phenomenon type, the warning level, the expected time window, and the specific meteorological thresholds that have been exceeded or are expected to be exceeded. Warnings are issued for six-hour windows and can cover multiple simultaneous phenomena in the same area — it is not unusual during autumn storm season for a coastal province to carry simultaneous warnings for rain, wind, and coastal phenomena at different severity levels.
The Four-Colour Warning System
Green: No Risk
Green indicates no meteorological risk — no adverse weather phenomenon is expected to cause significant impact. Green does not appear on the AEMET interactive map: its absence from the map is itself the indication that no warning is in force for a given area. This is the baseline state for most of Spain during stable weather periods, particularly across the Meseta Central and in the Canary Islands during summer months. No special precautions are required at green level. When the AEMET map shows a province without any colour overlay, the condition is implied to be green — normal, safe weather.
Yellow: Low Risk — Be Aware
Yellow is the lowest warning level that appears on the AEMET map. It signifies that there is no meteorological risk for the general population, but that specific outdoor activities or vulnerable individuals may be affected by unusual conditions for the area. AEMET’s official recommendation for yellow-level warnings is to “stay alert” and check the most current forecast regularly, as some outdoor activities could be disrupted. Yellow warnings are issued frequently across Spain — they are the most common warning level and are present somewhere in the country on most days between September and April. They cover the whole range of adverse weather types at their lower thresholds.
Yellow-level thresholds vary by region and phenomenon. For rainfall, a yellow warning in Valencia province is typically triggered by an expected accumulation of 20-40 mm in one hour or 40-80 mm in 12 hours, though precise thresholds differ across provinces. For heat, yellow warnings are typically issued when maximum temperatures are expected to exceed 36-38°C in the southern interior provinces or 33-35°C in the northern coastal provinces. For wind, yellow thresholds typically correspond to expected gusts of 50-65 km/h in inland areas or 65-80 km/h in exposed coastal and mountain locations. Yellow warnings indicate that conditions are noteworthy but not dangerous to the ordinary resident going about normal activities — they are more relevant to those planning outdoor sports, hiking, beach activities, or travel in potentially affected areas.
Orange: Major Risk — Be Prepared
Orange signifies a significant meteorological risk. Unusual meteorological phenomena are expected that carry a degree of danger for common daily activities. AEMET’s official recommendation for orange-level warnings is to “be prepared” — to take precautions, follow the latest weather information continuously, and anticipate that regular outdoor activities may be altered or cancelled. Orange warnings are serious events that warrant changing plans, avoiding unnecessary travel in affected areas, ensuring your vehicle is not parked in flood-prone locations, and staying informed through official channels.
Orange-level thresholds are substantially higher than yellow. For rainfall, orange warnings in Valencia are typically triggered by expected accumulations of 40-80 mm in one hour or 80-120 mm in 12 hours. For heat in southern Spain, orange corresponds to maximum temperatures expected to reach 42-44°C in the most exposed inland areas. For thunderstorms, orange-level warnings are issued for very organised and widespread storm systems with the possibility of locally very heavy rain, locally very strong winds, hail larger than 2 cm in diameter, and the possibility of tornadoes. Wind orange warnings typically correspond to expected gusts of 80-100 km/h in inland areas or 90-120 km/h in coastal and mountain exposures.
Red: Extreme Risk — Act Immediately
Red is the highest warning level in the AEMET system and represents extreme meteorological risk. Unusual meteorological phenomena of exceptional intensity are expected that pose a high risk to the population. AEMET’s official recommendation for red-level warnings is to “take preventive measures and act” — specifically to follow the instructions of local authorities, avoid all unnecessary travel, and continuously check weather updates. Red warnings are rare: they are issued when conditions are expected to be genuinely life-threatening or capable of causing catastrophic material damage.
Red-level thresholds represent exceptional meteorological events. For rainfall, red warnings are triggered by expected accumulations exceeding 80 mm in one hour or 120 mm in 12 hours — the kind of extraordinary rainfall that causes flash floods with the potential to sweep vehicles, people, and infrastructure. For heat, red warnings in southern Spain are issued when maximum temperatures are expected to exceed 44°C over multiple days with no overnight recovery. For wind, red warnings correspond to expected gusts exceeding 120 km/h — hurricane-force gusts capable of destroying buildings and infrastructure. For storms, red indicates highly organised, exceptionally intense convective systems producing all the most dangerous associated phenomena simultaneously: extreme rainfall, hail, tornadoes, and violent winds.
The October 2024 DANA floods in Valencia illustrate why red warnings must be taken with total seriousness: AEMET issued its first red warning for northern inland Valencia at 07:31 on 29 October 2024, extending it to southern Valencia at 07:36. The death toll of more than 237 people — despite the red warning having been issued — was attributed not to AEMET’s failure to warn but to failures in the communication chain, including a catastrophic delay in sending the ES-Alert mobile phone emergency notification to residents, which did not reach people’s phones until 20:11, over 12 hours after the first red warning.
The Nine Warning Categories Explained
Rainfall: Spain’s Most Consequential Warning
Rainfall warnings are the most consequential and most frequently issued of all AEMET warning categories, covering accumulated precipitation (total rainfall over a given period), intensity (maximum rainfall per hour), and the associated risk of flash flooding, river flooding, and mudslides. Spain’s Mediterranean coast — particularly Valencia, Alicante, Murcia, Almería, and the Balearic Islands — is the area most frequently subject to high-level rainfall warnings in autumn, when the combination of warm sea surface temperatures and cold air masses aloft creates the conditions for intense convective precipitation events. The DANA phenomenon (see below) is the primary driver of the most extreme rainfall events.
The specific rainfall accumulation thresholds for each warning level vary by region across Spain, reflecting different baseline climatology. An accumulation that would trigger a red warning in Galicia (where heavy rainfall is climatologically common and the population is adapted to manage it) might only trigger a yellow warning in Valencia (where the same volume arriving on drought-hardened soil into natural ramblas creates a qualitatively different risk). This regional differentiation is fundamental to the Meteoalerta system’s design.
Thunderstorms
Thunderstorm warnings are issued when organised convective systems producing lightning, hail, intense rainfall, and potentially tornadoes are forecast. Spain experiences approximately 300,000 lightning strikes per year, concentrated particularly in the Pyrenees, the Mediterranean coast, and the Canary Islands during summer and early autumn. Yellow thunderstorm warnings are issued for widespread activity with the possibility of locally heavy rain or small hail under 2 cm in diameter. Orange warnings cover very organised and widespread systems with potential for very heavy rain, very strong winds, hail larger than 2 cm, and possible tornadoes. Red thunderstorm warnings indicate highly organised, exceptionally intense systems producing supercells or mesoscale convective complexes.
Wind and Storm Warnings
Wind warnings are issued based on expected maximum gust speeds, with thresholds varying between coastal, mountain, and inland areas. The Canary Islands — exposed to Atlantic trade winds and storm systems throughout the year — are among the most frequently wind-warned territories. The Cantabrian coast, the Pyrenees, and the exposed capes of Galicia and the Levante coast are also regularly subject to wind warnings. Yellow-level gusts of 50-65 km/h can disrupt outdoor activities and make driving challenging for high-sided vehicles. Orange-level gusts of 80-100 km/h can cause structural damage to poorly secured roofs and scaffolding, uproot trees, and make road travel in exposed areas genuinely dangerous. Red-level gusts exceeding 120 km/h can cause catastrophic structural damage.
Snow and Avalanche Risk
Snow warnings are issued for expected accumulations in 24 hours, with thresholds varying dramatically between mountainous areas and lower-lying regions. The Pyrenees, the Cantabrian mountain range, the Sierra Nevada, and the Sistema Central all carry regular snow warnings from November through March. Yellow snow warnings may apply to accumulations of 5-20 cm in 24 hours depending on region; more extreme levels cover exceptional events. AEMET also issues separate avalanche risk bulletins for mountainous areas — the Boletín de Peligro de Aludes — which operate on an independent five-level European avalanche danger scale. The Pyrenees ski resorts of Baqueira-Beret, Formigal, and Grandvalira (Andorra) are all affected by these bulletins in winter.
Heat Warnings: Thresholds and Regions
Spain’s heat warning system operates on regionally calibrated thresholds that reflect the different climatological baselines across the country’s geography. AEMET spokesperson Rubén Del Campo confirmed that red heat warnings are generally issued at 40-44°C and orange warnings at 37-40°C, but that thresholds are “more restrictive in the southern half of the peninsula, and more lenient in mountainous areas and the far north.” In the cities of Córdoba, Sevilla, and Jaén — which regularly exceed 40°C in July — the warning thresholds for each level are calibrated higher than in Madrid or Bilbao, because the local population and infrastructure are adapted to high temperatures. Yellow heat warnings cover conditions that affect the elderly, young children, outdoor workers, and those with cardiovascular or respiratory conditions.
Coastal Phenomena
Coastal warnings cover sea state (wave height), storm surge, and coastal flooding. They are particularly relevant for the Cantabrian coast in autumn and winter, when Atlantic depressions regularly generate significant swell, and for the Mediterranean coast during intense storm events. Yellow coastal warnings are issued for wave heights of 2-4 metres; orange for 4-6 metres; red for wave heights exceeding 6 metres in the most exposed Atlantic-facing coasts. Coastal warnings are critically important for anyone planning sea activities — swimming, water sports, or boating — as even yellow-level sea states can be hazardous for inexperienced swimmers, while red-level states are lethal for all but the most experienced seafarers.
Fog Warnings
Fog warnings are issued primarily for road safety purposes. Spain’s national motorway and A-road network crosses multiple high-altitude plateaus and river valleys where radiation fog forms regularly from autumn through spring. The Meseta Central, the Ebro Valley, and major mountain passes carry the most frequent fog warnings. Yellow fog warnings typically indicate expected visibility below 200 metres; more severe levels cover conditions that make motorway driving at standard speeds genuinely dangerous. AEMET also produces specific road weather forecasts — Predicción de condiciones meteorológicas en carreteras — that complement the general fog warnings with route-specific information.
What Is a DANA? Spain’s Most Dangerous Storm
The Meteorology of Cut-Off Lows
DANA — Depresión Aislada en Niveles Altos (Isolated High-Level Depression) — is a meteorological phenomenon that is the primary driver of Spain’s most extreme rainfall and flooding events. It occurs when a cold air mass at high altitudes (typically the jet stream level, around 500 hPa, approximately 5,500 metres above sea level) becomes isolated or “cut off” from the main westerly flow over Europe, stalling over the Iberian Peninsula for periods of hours to several days. As this cold air mass interacts with the warm, moisture-laden air over the Mediterranean Sea and the warmer lower atmosphere, it creates exceptionally intense convective activity — extreme thunderstorms, torrential rain, and flash floods. DANAs are known in English as “cut-off lows” and are common in English-language meteorological reporting on Spain.
DANAs are particularly common in autumn across the Mediterranean basin, when the contrast between the still-warm sea surface temperatures (elevated by summer heating to 27-29°C in the western Mediterranean in recent years) and the first intrusions of cold polar air creates maximum thermodynamic instability. The World Meteorological Organization has noted that climate change is amplifying DANA events: rising Mediterranean sea surface temperatures increase the moisture content of the air being drawn into these systems, producing heavier rainfall over shorter periods, while drier summer soils reduce the ground’s capacity to absorb rainfall. A rapid attribution study following the October 2024 Valencia event estimated that climate change made the rainfall approximately 12 percent heavier and twice as likely compared to the pre-industrial climate.
DANA events can produce phenomenal rainfall totals in very short periods. In the town of Chiva, west of Valencia, 491 litres per square metre fell in just eight hours on 29 October 2024 — equivalent to nearly a year’s worth of rainfall in that single event, per AEMET’s own data. A water sensor on the Rambla del Poyo recorded a flow rate more than double that expected of a 500-year storm event (2,282 cubic metres of water per second) just before the sensor was swept away. One hour during the event’s peak recorded 185 mm of rainfall — four times the threshold at which all rainfall becomes surface run-off. These statistics describe conditions where dry ramblas (seasonal river channels) that were empty minutes before suddenly became walls of water moving at catastrophic speed through the villages and roads on their floodplains.
The October 2024 Valencia DANA: Spain’s Deadliest Modern Disaster
The DANA of 29 October 2024 is one of the deadliest natural disasters in Spanish and European history. Official death toll figures settle in the range of 224-237 confirmed deaths, with some peer-reviewed sources citing figures at different stages of the counting process. The disaster displaced approximately 15,000 residents, impacted nearly one million people across the Valencia region, and caused economic losses estimated at between €17 billion and €50 billion. Infrastructure losses were massive: roads, bridges, rail lines, and motorways were severed; thousands of vehicles were swept away or buried in mud; the Valencia metropolitan area’s commuter rail network was completely disrupted for weeks. The Spanish government declared three days of national mourning.
AEMET’s timeline is critical to understanding the disaster. On 25 October 2024, AEMET meteorologist Juan Jesús González Alemán publicly warned that the upcoming DANA could become a high-impact storm — a warning that was initially dismissed on social media as “alarmism.” On the morning of 29 October, AEMET issued its first red warning for northern inland Valencia at 07:31, extending it to southern Valencia at 07:36 — well before the catastrophic flooding reached populated areas in the afternoon. The critical failure was not AEMET’s warning — which met all international standards — but the communication chain downstream. Valencia’s Civil Protection sent the ES-Alert emergency mobile notification to residents only at 20:11, after the peak flooding had already killed hundreds. Valencia’s regional president Carlos Mazón spoke at a 13:00 press conference claiming the storm would dissipate by 18:00, publicly contradicting AEMET’s red warning while people were already beginning to die.
The political and institutional fallout was enormous. Mass protests erupted across Spain and in Valencia specifically. The disaster reignited scrutiny of the Valencian government’s 2023 decision to close the Valencian Emergencies Unit — a specialised coordination body established after the 2019 floods, with a budget of €9 million annually, that had been shut down as a “superfluous expense.” Multiple peer-reviewed analyses published in 2025 identified systemic failures: inadequate early warning mobile communication, ambiguous command and control structures, urbanisation of flood-prone areas during Spain’s real estate boom, and the elimination of specialised emergency infrastructure. The Bank of Spain estimated that the floods could reduce Spain’s economic growth rate by 0.2% for the last quarter of 2024.
Spain’s Regional Weather Risks
Mediterranean Coast: Peak Autumn Risk
The Mediterranean coast of Spain — from Catalonia in the north through Valencia, Alicante, and Murcia to the eastern Andalusian coast — is the area most frequently subject to high-level autumn weather warnings. The specific combination of warm sea surface temperatures, the sheltering effect of interior mountains that force moisture-laden air to rise abruptly, and the flat river plains and rambla networks that concentrate flash flooding in densely populated areas makes this coastline Spain’s most weather-risk-intensive zone from September through November. Barcelona, Valencia, Alicante, Murcia, Cartagena, Almería, Málaga, and every coastal resort between them all lie within the warning zone for autumn DANA events.
Tourists visiting the Costa Blanca, Costa del Sol, Costa Daurada, or the Balearic Islands in September and October should be specifically aware that this is the peak risk season for flash flooding and extreme storms. The vast majority of autumnal weather events produce only yellow or orange-level warnings — heavy rain without dangerous flooding — but red warnings do occur and must be treated with complete seriousness. Checking the AEMET warning map the night before and the morning of any planned outdoor activities is essential practice during these months. Any red warning in your coastal province during this season means: stay indoors, do not drive in underpasses or near riverbeds, and follow all official instructions immediately.
The Canary Islands: Year-Round Warnings
The Canary Islands — Spain’s archipelago of seven main islands approximately 100 km off the northwest coast of Africa — have their own weather warning section within the Meteoalerta framework, reflecting their subtropical climate. The islands are exposed to Atlantic storms and occasional tropical systems that bring wind and heavy rain, particularly from October through February. Gran Canaria and Tenerife experience localised extremes due to their mountainous interiors, with the northern flanks receiving much heavier rainfall than the southern tourist resorts. The southern beach resorts (Playa del Inglés in Gran Canaria, Los Cristianos in Tenerife, Corralejo in Fuerteventura) have significantly drier and calmer weather profiles than the island interiors and northern coasts.
Fuerteventura and Lanzarote — the easternmost, flattest, and driest of the major islands — are most affected by calima events: the periodic invasion of dust-laden hot air from the Sahara Desert that reduces visibility, coats everything in orange dust, and can raise temperatures dramatically for 24-48 hours. Calima events are not formally covered by AEMET’s standard Meteoalerta warning categories but are covered by specific information notices on the forecast pages. Wind warnings for the Canaries — particularly affecting the exposed western shores of Gran Canaria and Tenerife and the channels between islands — are issued regularly through autumn and winter.
Northern Spain: Atlantic Storms Year-Round
The Cantabrian coast — covering the Basque Country, Cantabria, Asturias, and Galicia — has the most Atlantic-influenced climate in mainland Spain, characterised by frequent rainfall year-round, regular Atlantic storm systems from October through March, and sea states that regularly trigger coastal warnings. This is the part of Spain most comparable in climate to the British Isles or northwestern France: green, lush, and frequently wet. Weather warnings here tend to be for rain, wind, coastal phenomena, and snow in the mountains — rarely for heat. The Cantabrian mountains receive exceptional snowfall from November through April, and AEMET’s avalanche bulletins are directly relevant for anyone skiing or mountaineering in these ranges.
The Meseta Central: Heat, Cold and Fog
The interior plateaus of Castilla y León, Castilla-La Mancha, Extremadura, and Madrid are the areas most frequently subject to heat warnings in summer and to cold and fog warnings in winter. The Meseta’s continental climate — hot summers and cold winters with relatively limited annual rainfall — produces temperature extremes that are among the most severe in mainland Europe. Cities like Salamanca, Ávila, and Soria experience winter temperatures regularly below -10°C overnight from December through February, while the same cities bake in temperatures exceeding 40°C in July and August. Madrid, despite its urban heat island effect, issues regular yellow and orange heat warnings across summer and specific cold-snap warnings in mid-winter.
Andalusia: Extreme Heat, Autumn Floods
Andalusia — Spain’s largest and most populous autonomous community, covering the south from Huelva in the west to Almería in the east — is the primary zone for Spain’s most extreme heat warnings in summer and significant flash-flood risk in autumn. The provinces of Córdoba, Sevilla, and Jaén regularly record the highest temperatures in Europe during July and August, with red heat warnings issued when temperatures approach or exceed 44°C. The Guadalquivir valley and the floodplain settlements of western Andalusia are periodically subject to significant flood warnings in autumn when Atlantic-origin systems interact with topographic features. The Costa del Sol resorts around Málaga and Marbella sit in the path of the same autumn Mediterranean storms that affect the Levante coast, while also experiencing some of the highest coastal summer temperatures in mainland Spain.
Practical Guide: Checking and Responding to Alerts
How to Access Live AEMET Warnings
The most direct source for live weather warnings in Spain is AEMET’s official website — aemet.es — available in both Spanish and English. The English-language warning map is at aemet.es/en/eltiempo/prediccion/avisos and shows the current and forecast warning status for all provinces of the Peninsula, Balearic Islands, and Canary Islands, colour-coded by warning level. The map updates continuously and allows you to click on any province to see the specific warning details: the phenomenon, the level, the time window, and the associated thresholds. AEMET’s website also provides full seven-day forecasts for 8,124 Spanish municipalities, hourly forecasts up to 48 hours ahead, marine forecasts, mountain forecasts, UV index, and fire risk maps.
AEMET’s official free app — available from the App Store and Google Play under the name AEMET — provides all the same warning functionality in a mobile-optimised format, with push notifications for your current location and saved locations. The app notifies you automatically when a new warning is issued for your area — the most practical tool for tourists and residents who want to stay informed without checking the website manually. The app supports location-based notifications in English and is completely free. The European multi-country warning aggregator Meteoalarm at meteoalarm.org also includes AEMET data and may be familiar to travellers from other EU countries who use it at home.
The ES-Alert emergency notification system sends automatic alerts to all mobile phones in an affected area during extreme emergencies, overriding phone silent modes to play a loud alarm sound. Following the October 2024 Valencia disaster — when the alert was sent over 12 hours after AEMET’s red warning — significant reforms were announced to improve communication speed and protocols. If you receive an ES-Alert on your phone while in Spain, treat it with absolute seriousness and follow the instructions given, which will typically be in Spanish.
What to Do at Each Warning Level
At yellow (BE AWARE): Check the AEMET forecast for your area each morning. Be aware that outdoor activities — hiking, beach activities, cycling, outdoor sports — may be disrupted. If planning a beach day near a coastal province under yellow warning, check the sea state forecast specifically. No need to cancel planned activities, but stay informed throughout the day and be flexible.
At orange (BE PREPARED): Take the warning seriously and actively modify your plans. Postpone non-essential outdoor activities. If your accommodation is in a low-lying valley, near a rambla or river, know your exit route and where high ground is. Avoid driving through underpasses, tunnels, or across bridges during heavy rain — even a few centimetres of fast-moving water can push a vehicle. Move vehicles away from low-lying car parks if rain is expected. Keep your phone fully charged. Check official social media for your region’s Civil Protection authority for local updates.
At red (ACT — avoid travel): Do not travel unless strictly necessary. Follow all instructions from local authorities immediately — if told to evacuate, do so. If trapped by flooding while driving, abandon your vehicle and move to high ground — never attempt to drive through moving or rising water. Do not attempt to cross flooded ramblas, riverbeds, or low-water crossings on foot. Stay inside a solid building, away from windows, on an upper floor if flood risk is present. Monitor AEMET, the regional Civil Protection’s official channels, and national broadcaster RTVE continuously. Call Spain’s emergency number 112 if you need immediate assistance.
Emergency Contacts and Official Resources
Spain’s single emergency number is 112 — covering police, fire, ambulance, and Civil Protection across all 17 autonomous communities. This number works from all phones, including foreign SIM cards and phones without a SIM, and operators can connect English-speaking callers to assistance if needed. The Civil Guard emergency number is 062. For road conditions and weather-related road closures, the Dirección General de Tráfico (DGT) maintains a real-time map at dgt.es and operates a 24-hour information line at 011 (within Spain). Regional Civil Protection authorities also operate their own emergency lines and social media accounts that provide local updates during active warning events. During major events, follow the official accounts of Protección Civil España on X/Twitter and the relevant regional authority for your area.
Seasonal Weather Calendar for Spain
Autumn (September–November): Peak Alert Season
Autumn is the peak season for high-level weather warnings across Spain’s Mediterranean coast. September through November combines two critical factors: the Mediterranean Sea retains summer heat (sea surface temperatures that reached record highs in 2023 and 2024), while the first intrusions of cold air from the north create the thermodynamic instability that drives DANA events. The Balearic Islands, Valencia, Alicante, Murcia, Almería, and the far south of Catalonia are all at elevated risk during this period. Every resident and tourist in these areas should make checking the AEMET map a daily habit throughout the autumn months.
Tourists visiting Mediterranean Spain between September and November should have a specific plan for monitoring AEMET warnings. The most important single action is checking the warning map every morning for the province you are in. If an orange or red warning is in force, treat it as a genuine meteorological event requiring behavioural change. The vast majority of days are settled and beautiful; the probability of a red warning on any given October day is low. But when red warnings are issued in this season, they have repeatedly proven to be accurate predictors of life-threatening conditions — the 2024 Valencia DANA was the most catastrophic example but not the only recent one. Similar, if less fatal, DANA events have occurred across the Mediterranean coast in 2018, 2019, 2020, 2021, and 2022.
Summer (June–September): Heat and Fire Risk
Spain’s summers — particularly in Andalusia, the Meseta Central, Extremadura, and the southern Castile interior — are defined by sustained high temperatures that regularly trigger yellow and orange heat warnings across the south and interior, and red heat warnings during exceptional heatwaves. The summer of 2023 produced multiple red heat warnings across Andalusia when temperatures in Córdoba and Sevilla reached 44-45°C; 2022 saw similar extremes that contributed to thousands of heat-related deaths across Spain and Portugal. Summer heat warnings are less dramatic in media terms than flooding warnings but are statistically more deadly on an annual basis.
Summer weather warnings also include wildfire risk — AEMET publishes fire risk maps complementing the standard warning system, providing guidance for firefighters, forestry services, and the public when drought, heat, and wind combine to create elevated ignition risk. The Mediterranean coast, the interior of Galicia and Asturias, Andalusia, and the Canary Islands are the primary wildfire risk zones. Yellow and orange fire risk periods trigger restrictions on outdoor burning and access to certain forest areas; red risk periods may involve road closures, evacuations, and bans on all outdoor activities near forested areas.
Winter (December–February): Snow, Cold and Atlantic Storms
Winter weather warnings across Spain cover a wide range of phenomena. The Pyrenees, Cantabrian mountains, and Sierra Nevada regularly receive exceptional snowfall triggering red snow warnings, while rare but significant snowfall events affect Madrid and central Spain — as in January 2021, when Storm Filomena deposited historic snowfall of 50-70 cm on Madrid, triggering red warnings and stranding thousands of vehicles on major motorways. Atlantic storms bringing wind and rain regularly produce orange and red wind warnings for the exposed coasts of Galicia, Asturias, the Basque Country, and the Canary Islands.
Winter cold warnings are issued for interior plateaus when temperatures are expected to reach -10°C or below — directly relevant to winter sport visitors travelling to Spain’s 30+ ski resorts in the Pyrenees, Sierra Nevada, and Cantabrian mountains. The Sierra Nevada ski station in Granada (Europe’s southernmost ski resort at altitude, operating at 2,100-3,300 metres) is the resort most likely to be directly affected by Mediterranean storm events that bring rain at lower altitude while delivering heavy snowfall at the resort level. The Pyrenean resorts of Baqueira-Beret, Formigal, Astún, and Candanchú receive both Spanish mainland Atlantic storm warnings and the specific Pyrenean mountain forecasts from AEMET’s dedicated mountain forecast service.
Spring (March–May): Transitional Season
Spring in Spain produces a transitional weather pattern: Mediterranean coast sea surface temperatures are at their annual minimum (around 14-16°C), which reduces the risk of the most intense DANA events; but Atlantic storm systems continue to affect the north and west, and isolated severe storms can develop over the Meseta Central and Ebro valley as the atmosphere begins warming. Spring is the safest season for weather warnings in southern and eastern Spain, though yellow-level rainfall and wind warnings remain common across the north and west. Easter week (Semana Santa) — one of Spain’s most heavily attended outdoor public events — falls in March or April and is frequently associated with unsettled weather in the centre and north that can disrupt outdoor processions.
Spain Weather Warnings and Tourism
What Tourists Need to Know
Spain attracts over 80 million tourists annually — one of the world’s highest totals — with the vast majority visiting the Mediterranean coast, the Canary Islands, the Balearic Islands, or major cities. For the majority of these visitors, weather warnings will not affect their holiday: most summer and spring visits encounter only settled, sunny weather with no warnings above green. The specific situation requiring preparation and awareness is autumn visits to Mediterranean Spain — September through November — when the DANA risk season overlaps with one of the most popular and climatologically attractive periods for holidays (lower crowds, lower prices, still warm temperatures on most days).
The practical advice for Mediterranean-coast autumn visitors is straightforward: download the AEMET app before you leave home, set it to your destination, and check the warning status every morning. If a yellow warning is active, carry a waterproof and be flexible with outdoor plans. If an orange warning is active, consider whether your planned activities are in areas that could be affected by flooding, and have an alternative plan. If a red warning is active, stay in your accommodation, follow all official guidance, and do not attempt to drive or walk through areas where water is accumulating. No view, beach, or tourist attraction is worth the risk of being caught in a flash flood during a red warning.
Travel insurance policies vary significantly in their coverage of weather-related disruptions. Most comprehensive travel insurance policies cover accommodation costs during forced stays due to red-level weather warnings, and some cover flight and transport disruption. If you are visiting Spain in autumn and are concerned about weather disruption, specifically check whether your policy covers “natural disaster” or “extreme weather” cancellation — and whether it requires an official AEMET red warning to be in place for coverage to apply.
FAQs
What do the weather warning colours mean in Spain?
Spain’s AEMET uses four colours under the Meteoalerta plan: green (no risk — does not appear on warning maps), yellow (low risk — be aware, specific outdoor activities may be affected), orange (major risk — be prepared, unusual phenomena that are dangerous for common activities), and red (extreme risk — act immediately, follow official instructions, exceptional phenomena posing high risk to the population). The system covers nine categories of adverse weather up to 72 hours in advance for all 17 autonomous communities, 50 provinces, and 326 comarcas.
Where can I check live weather warnings for Spain?
Live weather warnings are available at AEMET’s official website — aemet.es/en/eltiempo/prediccion/avisos — in both Spanish and English. The interactive map shows current and forecast warnings for all Spanish provinces, colour-coded by level, with clickable details on phenomena, time windows, and thresholds. The free AEMET app (iOS and Android) provides location-based push notifications. The European multi-country aggregator Meteoalarm at meteoalarm.org also includes AEMET data. For the Canary Islands, warnings are shown on a separate section of the same AEMET map.
What is a DANA weather event in Spain?
DANA — Depresión Aislada en Niveles Altos — is the Spanish meteorological acronym for a cut-off low: a cold air mass at high altitude that becomes isolated from the main atmospheric flow and stalls over the Iberian Peninsula. As this cold air mass interacts with warm, moist Mediterranean Sea air, it generates exceptionally intense convective rainfall events — flash floods, large hail, and tornadoes. DANA events are most common in autumn across Spain’s Mediterranean coast and Balearic Islands. The October 2024 DANA in Valencia killed more than 237 people and produced record rainfall of 491 mm in eight hours at Chiva — equivalent to nearly a year’s worth of rainfall in a single event.
What happened in the Spain floods of October 2024?
On 29 October 2024, a DANA weather event brought catastrophic flooding to eastern Spain, primarily the Valencia region. More than 237 people died — one of the deadliest natural disasters in Spanish and European history. In the town of Chiva, 491 mm of rain fell in eight hours. AEMET issued its red warning from 07:31 that morning, but Valencia’s Civil Protection did not send the ES-Alert emergency mobile notification to residents until 20:11 — over 12 hours later. Economic losses were estimated at €17-50 billion. The disaster triggered mass protests and intense political controversy. Climate change was estimated to have made the rainfall 12 percent heavier and twice as likely versus the pre-industrial climate.
What temperature triggers a red heat warning in Spain?
Red heat warnings are generally issued when maximum temperatures are expected to exceed 44°C, though the specific threshold varies significantly by region. AEMET spokesperson Rubén Del Campo confirmed that red warnings for heat are issued at 40-44°C and orange warnings at 37-40°C, but that thresholds are “more restrictive in the southern half of the peninsula” — meaning higher temperatures are required in the south, where populations and infrastructure are more adapted. In northern Spain and mountain areas, lower thresholds reflect the greater vulnerability of populations less accustomed to extreme heat. Individual provinces each have their own calibrated thresholds.
Should I travel to Spain if there is a weather warning?
Yellow warnings generally do not require changing travel plans — they indicate conditions that may affect specific outdoor activities but are not dangerous to the general population. Orange warnings warrant actively checking your specific plans: if you are travelling to a coastal area under orange rain warning, consider whether your itinerary includes activities in low-lying or flood-prone areas, and have contingency options. Red warnings are serious: if a red warning is in force for your specific province, follow the official guidance to avoid unnecessary travel — stay in your accommodation, monitor official channels, and call 112 if you need assistance. Airlines and rail operators typically issue specific guidance on service operations during red-level events.
How does AEMET’s system compare to other European countries?
AEMET’s Meteoalerta system is fully aligned with the European Common Alerting Protocol (CAP) and uses the same four-colour green/yellow/orange/red scale as the UK Met Office, Météo-France, DWD (Germany), and other European national meteorological services under the EUMETNET MeteoAlarm framework. The principal criticism that emerged from the October 2024 Valencia disaster was not directed at AEMET’s warning accuracy or timeliness — which met CAP standards — but at the downstream communication system and the 12-hour delay in the ES-Alert mobile notification reaching residents.
What is the ES-Alert emergency notification system?
ES-Alert is Spain’s national mobile phone emergency alert system, operated by Spain’s Civil Protection (Dirección General de Protección Civil y Emergencias). It sends automatic alerts to all mobile phones present in a defined geographic area, regardless of the user’s home network or nationality, overriding silent modes with a loud alarm sound. Following the October 2024 Valencia disaster — when the alert was sent over 12 hours after AEMET’s red warning — significant reforms to the system’s speed were announced. If you receive an ES-Alert while in Spain, read it immediately and follow the instructions, which will typically be in Spanish.
Which parts of Spain have the most weather warnings?
The Mediterranean coast — particularly Valencia, Alicante, Murcia, the Balearic Islands, Almería, and Málaga provinces — receives the highest concentration of significant weather warnings due to the DANA phenomenon in autumn. Galicia and the Cantabrian coast receive the most frequent Atlantic storm warnings for wind and rain in winter. The Pyrenees and mountain ranges receive the most snow and avalanche warnings from November through April. Andalusia’s interior (Córdoba, Sevilla, Jaén) receives the most extreme heat warnings in summer. The Canary Islands receive regular wind, calima, and rain warnings year-round. The Meseta Central receives the most fog and cold warnings in winter.
How far in advance does AEMET issue weather warnings?
AEMET’s Meteoalerta plan issues formal warnings up to 72 hours (three days) in advance, in six-hour intervals, updated continuously as new forecast model runs are processed. For longer-range severe weather threats, AEMET may publish special information notices or preliminary bulletins more than 72 hours ahead — as occurred with the October 2024 DANA, when an AEMET meteorologist publicly flagged the potential high-impact event four days before it struck. Seven-day probabilistic forecasts are available for all 8,124 Spanish municipalities, though these are not formal warnings.
What should I do if there is a red weather warning in Spain?
Do not travel unless strictly necessary. Stay indoors in a solid building, on an upper floor if flood risk is present. If driving when a red warning strikes: do not attempt to cross flowing water, do not drive through underpasses or near riverbeds, and if your vehicle is threatened by rising water, abandon it immediately and move to high ground. Follow all instructions from local authorities. Monitor AEMET at aemet.es, your regional Civil Protection’s official social media, and national broadcaster RTVE continuously. Call Spain’s emergency number 112 if you need immediate help. The inconvenience of staying indoors is trivial compared to the risk of being caught in a life-threatening event during a red warning.
Is the AEMET app available in English?
Yes. The AEMET official app is available in both Spanish and English, downloaded free from the Apple App Store and Google Play Store. The app provides the full warning map, location-based notifications, seven-day forecasts, hourly forecasts up to 48 hours, marine forecasts, and UV index information. Setting your phone location to Spain enables automatic push notifications for any new warning issued for your current location. The website aemet.es also has a full English-language version accessible via the language selector at the top of the homepage.
How accurate are Spain’s AEMET weather warnings?
AEMET’s warning system is internationally well-regarded for technical accuracy. Multiple independent meteorological reviews of the October 2024 Valencia DANA found that AEMET accurately identified and warned of the extreme event within its design parameters — issuing its red warning for Valencia from 07:31 on the day of the disaster. The deaths that followed were attributed not to inaccuracy in AEMET’s warning but to failures in the downstream Civil Protection communication chain. For day-to-day forecasting accuracy, AEMET’s performance is comparable to the European Centre for Medium-Range Weather Forecasts (ECMWF) — the global benchmark for meteorological forecast accuracy.
To Conclude
Spain’s weather warning system — operated by AEMET through the Meteoalerta national plan — is one of Europe’s most sophisticated meteorological alert frameworks, providing colour-coded warnings for nine categories of adverse weather up to 72 hours in advance for every province in the country. Understanding the system — what each colour means, what thresholds trigger each level, and most importantly how to respond at each level — is essential knowledge for anyone living in, working in, or visiting Spain.
The October 2024 Valencia disaster demonstrated with terrible clarity both the technical competence of AEMET’s warning system and the critical vulnerability in the human chain between those warnings and the population that needed to act on them. The reforms announced in the disaster’s aftermath — to ES-Alert communication speed, Civil Protection coordination protocols, and the restoration of specialised regional emergency units — represent Spain’s institutional response to a catastrophic failure that cost more than 237 lives.
For any visitor or resident in Spain: bookmark aemet.es and download the AEMET app before you need them. Check the warning map every morning during autumn visits to the Mediterranean coast. When a red warning is issued for your province, treat it with the same seriousness you would treat any life-threatening weather emergency — because in Spain, red warnings have repeatedly proven to be accurate predictors of genuinely dangerous conditions. The most important number to know: 112.
Climate Change and Spain’s Weather Warning Future
Why Warnings Are Becoming More Frequent
The frequency and intensity of severe weather warnings across Spain have increased measurably over the past decade, driven by the specific combination of Mediterranean Sea warming and the broader effects of anthropogenic climate change on European atmospheric circulation. Spain’s national meteorological records — maintained continuously since 1887 — show that the five warmest years on record for Spain all occurred after 2015, and that the intensity of both heat events and extreme rainfall events has increased significantly since the early 2000s. The World Meteorological Organization (WMO) Secretary-General Celeste Saulo summarised the mechanism directly in the context of the October 2024 Valencia floods: “As a result of rising temperatures, the hydrological cycle has accelerated. It has also become more erratic and unpredictable, and we are facing growing problems of either too much or too little water. A warmer atmosphere holds more moisture which is conducive to heavy rainfall.”
The specific Mediterranean warming trend is the most directly relevant factor for Spain’s autumn warning outlook. Mediterranean Sea surface temperatures in late summer and early autumn — which are the primary fuel source for DANA events — have been running 1-3°C above the 20th-century average in recent years, with the summer of 2023 producing record Mediterranean sea temperatures. Each additional degree of sea surface temperature increases the amount of water vapour available to be lifted into DANA convective systems, directly increasing the potential rainfall accumulation in a given event. The rainfall attribution study for the October 2024 Valencia DANA estimated that climate change made the specific rainfall event 12 percent heavier and twice as likely — a finding consistent with the broader IPCC assessment that extreme Mediterranean rainfall events are increasing in both frequency and intensity.
What This Means for Residents and Visitors
For long-term residents of Spain’s Mediterranean coast, the practical implication of increasing warning frequency is the need for a permanent readiness posture during autumn months that was less necessary a generation ago. Local authorities in Valencia, Alicante, and Murcia have been investing in warning communication infrastructure, flood defence works, and emergency planning following the 2024 disaster — but the physical geography of low-lying rambla floodplains and the centuries of urban development in flood-risk areas means that no infrastructure investment can entirely eliminate flash flood risk. The most effective individual adaptation is cultural: treating AEMET warnings as mandatory behavioural guidelines rather than optional advisories.
For visitors and tourists, the climate change context primarily affects the statistical probability of encountering severe weather during autumn visits to Mediterranean Spain. The probability of any given week encountering a red warning has increased over the past decade and is projected to continue increasing through the 2030s under all mainstream climate scenarios. This does not make autumn Mediterranean Spain unsafe to visit — the majority of days remain beautiful and settled — but it does mean that weather monitoring and emergency preparedness should be treated as a normal part of travel planning for these destinations rather than an exceptional precaution.
AEMET itself has become increasingly engaged in public climate communication since the 2024 disaster, publishing specific reports on the relationship between climate change and the frequency of DANA events and actively countering the dismissal of extreme weather warnings as “alarmism.” The agency’s AEMET spokesperson Rubén Del Campo has been one of the more prominent public scientific voices in Spain’s climate communication landscape, providing accessible explanations of warning thresholds and the meteorological basis for extreme event forecasts.
Understanding Spain’s 17 Autonomous Communities and Warning Zones
How Regional Differences Affect Thresholds
Spain’s 17 autonomous communities — and the two autonomous cities of Ceuta and Melilla — each have their own Civil Protection structures, their own emergency response capabilities, and their own calibrated AEMET warning thresholds that reflect local climatological conditions. The Meteoalerta plan explicitly acknowledges that “the thresholds for alerts are not the same for all of Spain” and that they are calibrated on a province-by-province basis to reflect the specific climate of each area. This regional calibration is one of the system’s most important features: it means that a warning issued in Seville and a warning at the same level issued in Santiago de Compostela represent genuinely different meteorological conditions rather than the same absolute temperature or rainfall amount.
Catalonia — with its own autonomous government (Generalitat de Catalunya) — has the highest level of autonomous emergency response capability of any Spanish region, with a well-developed Civil Protection structure, a dedicated Catalan meteorological service (Meteocat) that operates alongside AEMET for the region, and established protocols for public communication during warning events. The Meteocat service issues its own regional forecasts and warnings calibrated specifically for Catalonia’s complex topography — from the Pyrenees through the Mediterranean coastline — and provides bilingual (Catalan/Spanish) services. For visitors to Barcelona and the Catalan coast, both AEMET and Meteocat are relevant warning sources.
The Balearic Islands — Mallorca, Menorca, Ibiza, and Formentera — are governed by the Consell de les Illes Balears and have their own Civil Protection unit responsible for translating AEMET warnings into public communication. The islands’ tourism-heavy economy and the large number of international visitors present specific communication challenges during warning events: the ES-Alert system reaches all mobile phones regardless of nationality, but the messages are primarily in Spanish (and Catalan), meaning international tourists may not immediately understand the specific instructions being given. Anyone visiting the Balearics during autumn is strongly advised to have the AEMET app set to their island, as the app provides warnings in English.
Historical Context: Spain’s Major Weather Disasters
A Pattern of Mediterranean Disasters
Spain’s history of Mediterranean flood disasters predates the modern warning system by centuries — the Valencia region specifically has been subject to catastrophic flooding events since at least the 18th century, when the old course of the Turia river flooded repeatedly before its diversion following the catastrophic 1957 Valencia city flood that killed over 80 people. The town of Oliva, south of Valencia, has experienced 20 intense floods since 1972 alone — approximately one every 2.6 years on average — reflecting the specific hydrological vulnerability of coastal rambla systems that can transition from dry channels to raging torrents in under an hour.
The modern warning system’s development has been directly shaped by these disasters. The 1996 Biescas campsite disaster — in which a flash flood killed 87 campers in the Pyrenean valley of Arazas in August 1996, caused by a DANA event that dropped 300 mm of rain in three hours — triggered the first major public debate about flash flood warning systems and the specific danger of camping in mountain river valleys during summer storms. The 2019 Valencia floods — less catastrophic than 2024 but still significant — prompted the establishment of the Valencian Emergencies Unit that was subsequently closed in 2023. Each major event has produced specific institutional reforms, though the October 2024 disaster revealed that the accumulation of those reforms had not yet produced a communication system capable of reaching the population quickly enough when the most extreme events struck.
The broader lesson from Spain’s warning history is that the system’s technical competence at the AEMET level — accurately forecasting and warning of extreme events — has consistently outpaced the institutional and social infrastructure required to act on those warnings effectively. This is not uniquely a Spanish problem: the 2021 Ahr Valley floods in Germany killed over 180 people despite warnings having been issued, and produced similar debates about the gap between meteorological forecast accuracy and public communication effectiveness. The specific Spanish contribution to this global challenge is the regulatory and institutional reform programme that emerged from 2024 — a programme whose outcomes will determine whether the country is measurably better prepared for the next major DANA event when it arrives.
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