Summer is no longer knocking on the door – it is kicking it wide open.
France is experiencing a heatwave at the end of May that even seasoned meteorologists find astonishing. While many people still think of spring jackets, variable days, and cool mornings, temperatures in the western part of the country are already climbing to levels usually seen in the peak of summer. Regions along the Atlantic coast and in the west of the country are particularly affected. Since Tuesday, an extraordinary weather pattern has been prevailing there, with temperatures significantly above the usual May values.
In cities like Nantes, Bordeaux, or Lyon, the thermometer climbs to 34 to 35 degrees Celsius. Even in typically moderate regions, the weather map suddenly shows deep orange to red shades. Numerous departments are under warning levels due to extreme heat. And the end of this weather situation is not yet in sight.
The timing is especially remarkable.
Temperatures beyond the 30-degree mark at the end of May are usually still considered exceptional in France. This time, however, experts are talking of a historic event. The air masses come from North Africa and are pushed into Western Europe by a stable high-pressure system. Meteorologists refer to this as a so-called “heat dome.” It acts like a lid over the atmosphere—the warm air accumulates, rain is absent, and temperatures continue to rise day by day.
More than 350 weather stations have already reported new temperature records for May. This shows how unusual the situation really is. Many older people remember hot summers like 2003 or 2019, but such an early heatwave feels almost surreal even for France. “This is really intense,” is often heard these days in street cafés or at train stations.
The health risks now come to the forefront.
Many people know heat from midsummer—the body adapts to it. But at the end of May, this adjustment is often still completely lacking. Apartments retain heat more strongly, schools and offices rarely have air conditioning, and many underestimate the strain. Especially older people, children, construction workers, or athletes quickly reach their limits.
Authorities are therefore calling to avoid physical exertion, drink enough water, and regularly check on vulnerable individuals. Especially in cities, heat accumulates between concrete, asphalt, and densely built-up streets like in an oven.
However, there is more behind the current weather situation than just an extraordinary spring.
Climate researchers have observed for years that heatwaves occur earlier, last longer, and are more intense. What was once an extreme event is increasingly becoming the new reality. Classic summer heat is shifting forward on the calendar—bit by bit, year by year.
France is thus getting a foretaste in May of a summer that will likely spark many discussions. About air conditioning, urban planning, water supply, and the question of whether Europe is even prepared for these new temperatures.
Because one thing this week clearly shows: The old notion of a mild spring is faltering.
By C. Hatty