Deadly heat of up to 42 degrees Celsius is scorching southern Europe, as scientists warn of a "Molotov cocktail" of climate conditions that is fueling huge fires across the Mediterranean.
Météo-France placed more than half the country under heatwave warnings, with 12 of the continent's 96 administrative units under the highest red alert, while Spain's Aemet warned of "extreme danger" in Zaragoza and the Basque Country, after issuing yellow and orange warnings for almost the entire rest of the country.
Both weather agencies predicted temperatures above 40 degrees Celsius over the coming days and called for vigilance amid predictions of a "very intense, even extraordinary" heatwave in parts of the continent.
High temperatures have alarmed experts as firefighters try to contain the devastating blazes.
In France, which brought its biggest wildfire since 1949 under control on Sunday, authorities reported that one person had died in the flames, while 20 firefighters and five civilians were injured.
In Italy, where temperatures of 40 degrees Celsius are expected to reach Florence on Wednesday, tourist trails were closed on Mount Vesuvius on Sunday as firefighters battled a blaze on the volcano's slopes.
In Spain, wildfires that broke out in León and Zamora on Sunday forced more than 1,000 people to flee their homes, while large fires continued to burn in Galicia.
Cristina Santín Nuño, a fire scientist at the Spanish National Research Council, said the large number of blazes was "expected" after a rainy spring that helped plants grow was followed by extreme heat, strong winds and long periods without rain.
“If we add to this the relatively easy possibility that a spark could start a fire somewhere… we have all the ingredients for the ‘Molotov cocktail’ we are seeing now,” she said.