Spain begins the week with heightened weather alerts across ten regions. Severe storms and a rare rissaga have prompted authorities to raise the alarm in Aragón, Catalonia and Menorca. The State Meteorological Agency (AEMET) has issued orange warnings for these areas, citing intense rainfall and large hail, along with impressive sea-level oscillations in Menorca. AEMET’s warning bulletins classify alerts by region and hazard, covering rain and thunderstorms, hail and wind, as well as coastal conditions.
Menorca has a coastal orange alert over the threat of a rissaga, a rapid fluctuation in sea level expected to reach up to 1.2 metres during the day. Such oscillations can disrupt port operations and put vessels and coastal infrastructure at risk. Catalonia faces its own orange alert from midday, with forecasts of up to 30 litres of rain per square metre in one hour, particularly in the Aran Valley, Lleida and Barcelona. The storms may bring hailstones exceeding 5 centimetres, along with very strong wind gusts, especially in Lleida.
Aragón is also under orange alert for severe weather, including heavy downpours and large hail, with powerful winds also forecast. Huesca is identified as a particularly vulnerable area. The warnings are set to remain in place throughout the day as authorities monitor the developing situation. In Catalonia, forecasts from the Servei Meteorològic de Catalunya (Meteocat) inform civil-protection decisions under the INUNCAT emergency plan. Heavy rainfall can bring risks beyond the precipitation itself, including rapid rises in rivers and streams. Warning levels and emergency measures may change as a storm’s path develops.
Seven other regions, Andalucía, Cantabria, Castilla y León, Castilla-La Mancha, Extremadura, Galicia and Navarra, are on yellow alert for rain and storms. Andalucía’s warning is expected to end by 10 a.m., with Huelva and Sevilla likely to see up to 20 litres of rain per square metre per hour. Cantabria’s alert will last until late afternoon, with rainfall of around 15 litres per square metre per hour. In Castilla y León, León, Palencia, Ávila and Salamanca are forecast to receive similar amounts, while wind gusts could reach 70 km/h in Zamora, Salamanca and Valladolid.
Castilla-La Mancha and Extremadura will remain under yellow alerts until late afternoon. Ciudad Real, mountain areas of Toledo and the Tajo valley face strong storms and hourly rainfall of up to 15 litres per square metre. Extremadura’s storms may also bring strong winds. Galicia and Navarra, specifically Ourense and the Navarrese Pyrenees, are under yellow alerts for storms with hail and similar rainfall rates. In Galicia, the warning is expected to end by evening; in Navarra, it will persist until the end of the day.
These alerts fit a pattern of increasingly volatile weather during Spain’s summer months. As noted in recent coverage of unusual August storms, authorities have had to adapt quickly to sudden shifts in weather patterns. The northeast and Balearic Islands are frequently at the centre of these events.
Rissaga events are a known hazard in the Balearic Islands, particularly in Menorca’s ports, where rapid sea-level changes can cause flooding and damage to boats and infrastructure. Orange and yellow weather alerts in Spain indicate different levels of potential risk to people, property and activities. Residents and travellers in affected areas are advised to follow updates from AEMET and local authorities, since conditions can change rapidly.
