A blaze in southern France forced the closure of the Marseille airport, and weather agencies issued warnings for other parts of Europe where temperatures were expected to climb this week.

A 10-day heat wave that ended on July 2 pushed temperatures above 40C (104F) across parts of Western Europe. According to scientists from Imperial College London and the London School of Hygiene and Tropical Medicine, climate change intensified the heat by as much as 4C (39F) in 12 major cities, including Barcelona, Madrid, Milan, and London.

The heat was so expansive that mountaintops, including the French Alps, that are usually frozen from snowpack saw record temperatures. Heat records were set for June in Spain and Portugal.