Severe storms are set to hit Catalonia and eleven other regions. Meteorologists warn of heavy rain, hail, and sharp drops in temperature. Millions face emergency alerts across Spain.
Cold air has slammed into humid air over Spain. The result: violent storms, sudden rain, and a sharp drop in temperatures. Catalonia is right in the middle of it. Officials warn that rain could hit 40 litres per square metre in just one hour. In some places, totals may top 100 litres in a few hours. The State Meteorological Agency (Aemet) says these numbers are not just forecasts. They are already confirmed for the worst-hit coastal and pre-coastal areas of Barcelona. Local drains may not cope.
Aemet has put twelve autonomous communities on rain or storm alert. Catalonia is under a critical orange warning. The worst is expected after 21:00. The Prepirineo, Barcelona’s coast and pre-coast, and the central depression are in the crosshairs. Here, up to 90 mm of rain could fall in less than three hours. Flash floods are a real risk. The orange alert is Spain’s highest active warning. Catalonia faces more danger than the other regions, which are on yellow alert.
Meteocat has specifically escalated warnings for Catalonia, focusing on Barcelona and Tarragona on Monday, and Girona and Lleida on Tuesday as the storm system shifts.
Other regions are not safe. Aragón, Extremadura, Castilla y León, and much of northern Spain—including Asturias, Cantabria, Galicia, Navarra, and the Basque Country—are under yellow alerts. Heavy rain, hail, and wind gusts up to 90 km/h are possible. Andalucía has been on alert since early morning. Grazalema, the Estrecho, and parts of Málaga and Huelva are bracing for downpours and hail. Official data shows these yellow alerts mean real risk, but not as high as Catalonia’s orange warning.
In the Valencian Community, the interior of Castellón and Valencia are on alert for storms that could dump 20 litres per square metre in an hour. Castilla-La Mancha, Ceuta, and parts of Castilla y León are also under yellow warnings. Hail and sudden wind surges add to the threat. Aemet says these dangers are highly local. Sudden downpours and storms can trigger flash floods in minutes.
What’s causing this? A mass of cold air high above Spain is making the atmosphere unstable. Thick clouds are spreading across the country. Local storms are popping up, some with hailstones up to two centimetres wide. Most of Spain will see temperatures plunge. But Galicia and the Cantabrian coast will get a rare warm spell. The Balearic Islands will barely notice a change. AccuWeather, citing Aemet, says the orange alert for Catalonia is backed by international forecasts.
Independent reports confirm that the danger is not uniform rainfall but rather localized downpours, thunderstorms, and possible flooding, which significantly raises the risk of sudden flash floods within short intervals.
Aemet says the most dangerous rain is set for Catalonia. The Servei Meteorològic has raised the risk to 4 out of 6. The threat will last through the night and into Tuesday. Tarragona’s coast and pre-coast could see 100 litres per square metre in twelve hours. Lleida is under yellow alert for 20 litres in an hour, hail, and strong winds.
Elsewhere, the pattern repeats. Sudden, heavy showers. Short but fierce hailstorms. Wind gusts that could disrupt travel and outdoor plans. The Mediterranean coast, Balearic Islands, Galicia’s shoreline, and the Strait of Gibraltar will see low clouds and light rain. The weather stays unsettled.
For those watching Spain’s wild weather, these warnings echo the earlier surge in storms that have tested local infrastructure and emergency crews again and again.
Orange alerts mean real risk to daily life. Yellow warnings flag dangers for certain activities. The message is simple: stay alert. The next hours will test communities across Spain. Catalonia faces the biggest threat. Torrential rain, hail, and wind could bring sudden chaos. This episode shows how unpredictable Spain’s weather can be. Local readiness matters more than ever as storms grow stronger and more frequent.
