Heavy Rain Triggers Flood Alert in Catalonia

The Catalan regional government, the Generalitat, has once again activated the ES-Alert emergency notification system after torrential rain swept across Catalonia, triggering flooding and widespread transport disruption.

The town of Granollers was among the areas worst affected, with flooding reported in streets and local infrastructure struggling to cope with the volume of water.

Authorities also confirmed significant disruption to mobility across the region, as roads and public transport services faced delays and complications caused by the intense rainfall.

In the aftermath of the storm, questions circulated over whether Catalonia had experienced a so-called 'mini-hurricane'. Meteorological experts clarified that this was not the case.

Instead, they identified the phenomenon as a mesoscale convective system exhibiting cyclonic rotation — a large, organised cluster of storms capable of producing intense and sustained rainfall over a localised area.

Given the elevated risk of further flooding, regional authorities declared an emergency situation, allowing them to mobilise resources and coordinate a rapid response to protect residents.

The ES-Alert system, used across Spain for serious civil protection emergencies, sends direct warning messages to mobile phones within the affected zones, informing residents of imminent danger and recommended safety measures.

This marks another in a series of activations of the alert system in Catalonia this year, reflecting a pattern of recurring intense rainfall events affecting the region.

Officials have urged the public to remain vigilant and to follow official guidance, warning that atmospheric instability could persist, with further rain and flooding risks expected in the hours ahead.

The situation remains under close observation by regional meteorological and emergency services, as authorities continue to assess the impact of the storm and prepare for potential further weather developments in the coming days.