Torrential rain from Storm Adam has killed at least four people in eastern Spain, triggering severe flooding that swept away cars, submerged roads and forced thousands to evacuate, authorities said on Monday.

The downpour, which began on Saturday, dumped up to 700 liters of rain per square meter in 24 hours in parts of the Valencia region, isolating towns along the Mediterranean coast. Two victims were found in the coastal resort of Oliva, including a 79-year-old woman in her home and a man who suffered a fatal heart attack at a campsite. A third person drowned at a beach in Sagunto, while a fourth died after falling into a rain-swollen stream in Catalonia .

Emergency crews carried out more than 400 rescues in Valencia, with some residents airlifted from rooftops as floodwaters cut off access routes. In Els Poblets, northeast of Alicante, cars were piled atop one another, and residents salvaged mud-coated furniture from their homes. “The village, well, it’s a disaster. Some people have lost everything all over again, just like in 2007,” local resident Javier Fornez said .

Authorities initially ordered about 800,000 residents in 100 municipalities to stay indoors, but restrictions were reduced to 87,000 people in eight municipalities by Monday afternoon as conditions improved. The Balearic Islands, including Mallorca and Ibiza, also saw disruptions, with schools closed and flights delayed .

Prime Minister Pedro Sanchez said military emergency teams were assisting with rescue efforts and pledged full government support. The flooding follows a record-hot September in mainland Spain, according to the national weather agency AEMET, which reported the country’s warmest summer between June and August .