The State Meteorological Agency (Aemet) has issued a yellow alert for the province of Castellón, warning of heavy rain and thunderstorms that could bring hail, particularly in Els Ports. The alert runs from 14:00 to 22:00 and covers the northern interior, where rainfall could reach 20 liters per square meter in a single hour. It follows a brief spell of stable weather in the region.
Aemet forecast models point to the heaviest precipitation in Els Ports. Baix Maestrat and l'Alt Maestrat may also see afternoon showers, as may Alto Mijares. Rainfall in these zones is likely to be minimal compared with the northern interior. The alert flags the risk of sudden downpours and localized hail, which could affect daily activities and local transport.
Across the wider Comunitat Valenciana, early September will bring variable cloud cover and a low chance of light, scattered showers, especially in the southern half of the region. Aemet says dust in the atmosphere could make the showers muddy. Minimum temperatures are expected to rise or hold steady, while maximums may fall or remain unchanged. In Alicante, temperatures are forecast to range from 22°C to 31°C. Castellón city will have similar minimums, with highs of up to 30°C. Valencia is expected to see temperatures from 23°C to 29°C.
These weather warnings are common in late summer, when atmospheric instability can trigger sudden storms. Local authorities typically advise residents to follow updates and take precautions during alert periods. Severe weather has also hit other parts of Spain: storms in Tarragona led to tragic incidents, including a fatal wall collapse in Roda de Berà that prompted official mourning.
For residents and visitors in Castellón, the alert makes clear the importance of tracking official updates and preparing for rapid changes in the weather. The yellow alert system is designed to warn the public about potential hazards without causing unnecessary alarm, giving people time to adjust their plans and reduce risk. As the region enters September, the advisories reflect the unpredictable Mediterranean weather and the need for vigilance during storm-prone periods.
