Barcelona went into emergency mode on Wednesday evening after a sudden downpour triggered flash flood warnings and power outages, disrupting transport across the area. The Servei Meteorològic de Catalunya issued an orange alert as heavy rain swept through the city and surrounding province, peaking just after 18:00. By 21:30, civil protection officials had escalated their response. Ara and Moncloa reported that Protecció Civil activated the Inuncat plan, warning of up to 40 liters per square meter in 30 minutes and, in some places, 60 to 90 liters per square meter over three hours.
Residents in Barcelonès and Maresme were told to prepare for severe weather over the next two hours. Protecció Civil warned of a real risk of flash flooding. It urged people to avoid unnecessary travel and follow official instructions, and told anyone in danger to call 112. The most dangerous period was expected on the evening of September 16 and into the early hours of Thursday, Europa Press and betevé reported.
La Vanguardia reported that municipal authorities in Barcelona activated a special plan to manage potential overflow of the city’s drainage system, amid the risk of urban flooding in the city and suburban areas.
The storm quickly caused problems. Six separate incidents on the electricity grid left nearly 7,700 customers in Barcelona without power, the Generalitat reported. Repair crews were sent out, and Protecció Civil said the disruptions occurred during the worst of the storm.
Transport was also affected. The Ajuntament de Barcelona closed the Ronda de Dalt at exits 2 (Llobregat) and 3 (Besòs), as well as all entry points 1, 2 and 3 (Llobregat). Emergency teams from Els Bombers de Catalunya and the GUB were sent to the affected areas to prevent further incidents and protect people. Restrictions extended beyond Barcelona, with flooding and infrastructure failure risks affecting Baix Llobregat, Garraf, Alt and Baix Penedès, and Vallès Occidental.
Warnings extended beyond Barcelona. Protecció Civil announced that ES-Alert messages would go out to residents in Baix Llobregat, Garraf, Alt and Baix Penedès, and Vallès Occidental. The risk of heavy rain was expected to last until at least 1:00 on Thursday morning. The storm system was moving across much of Catalunya. Moncloa and Ara reported that coastal and foothill areas were both affected.
Ara and Europa Press reported that the threat included locally intense rainfall, raising the risk of sudden flash floods in riverbeds and low-lying urban areas. Authorities repeatedly advised residents to limit travel and avoid flood-prone areas. They also urged people to follow emergency instructions and call 112 if in danger.
Sudden weather emergencies are not new for the region. As reported earlier, Barcelona’s infrastructure and public services have faced repeated stress in recent years, from major events to natural disasters. This latest storm tests how well the city can adapt to increasingly unpredictable weather.
The alert shows how quickly severe weather can disrupt daily life in a densely populated city. Thousands faced power cuts, and major roads were closed, putting the city’s emergency response under pressure. Local authorities shut basic roads and sent out emergency teams. They also issued targeted alerts to protect residents. The frequency and intensity of these incidents suggest Barcelona, like many European cities, will need to keep investing in stronger infrastructure and emergency plans to handle the growing risks from extreme weather.
