2023-06-21 12:27:00
The French will have to get used to it. Tropical nights will become the norm during the summer periods (June, July, August), according to a classification by Météo-France, which relates to the average of tropical nights expected between 2041 and 2070. These so-called nights “tropical” are nights during which the temperature does not drop below 20°C.
“There, it will directly affect the most fragile people”alert Mary Kerdoncuff, researcher at Météo-France, to our colleagues from Figaro. Rising temperatures, which is a public health issue, is likely to intensify by the middle of the century, even at night.
The Var and the Alpes-Maritimes escaped at the top of the classification, because the Mediterranean coast is the most conducive to hot nights.
According to Mary Kerdoncuff, it is the increase in sea temperature that will help prevent the coastline from cooling at night.
Nice, Cagnes and Saint-Laurent-du-Var in the lead
A Nice, first city in the rankingthere will be 73 tropical nights recorded between 2041 and 2070. We find tied in second and third positions the municipalities of Cagnes sur mer et Saint-Laurent-du-Varwith 70 tropical nights.
If it is obviously the south of the country that will be the most affected by these episodes, “even in the northern half of France we will learn to know this phenomenon well”, says Mary Kerdoncuff. As our colleagues from the Figarofor 16 cities, two-thirds of summer nights will be tropical over this period.
The cities of the Rhône-Alpes region will be those where the climate will change “most radically”according Le Figaro. In the Lyon region, it will be both the Mediterranean climate and a continental position that will accentuate the warming phenomenon.
Large cities most affected by heat
Night heat figures would be underestimated in large cities, as they do not take into account the absorption of solar heat by buildings, which continue to heat up during the night. Mary Kerdoncuff adds that “the temperature can’t go down like it does in the countryside.”
The luckiest will be the territories on the edge of the English Channel, because the water should remain below 20°C, and in the mountains, where “areas remain preserved”.
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