No department is on heat wave alert, even orange, Météo-France announced Thursday afternoon. The weather agency thus put an end to an episode of extreme heat which hit a large part of the country for a week.
Up to 15 departments, in particular the whole of Ile-de-France and Hauts-de-France, had been placed on heatwave red alert. At issue: the risk of excess mortality linked to very high temperatures, combined with ozone pollution and the Covid-19 epidemic.
On Wednesday, all red vigilance had been lifted, leaving 47 departments of a large north-eastern quarter in orange vigilance. Thursday morning, 21 still remained in orange vigilance, before the announcement of the total lifting at 4 p.m.
A marker of global warming
The multiplication of heat waves is one of the clearest markers of global warming. This new episode did not reach the intensity of those of 2019, with a record at 46 ° C, nor the length of the historic heatwave of 2003
However, it should be classified in the five most severe that France will have known: it was marked by tropical nights, the threshold of 40 ° C crossed on many weather stations and series of several consecutive very hot days for some. towns, even north of the Loire.
The historic station of Paris-Montsouris thus recorded six days above 35 ° C in one week (compared to 9 consecutive days in 2003), with a peak at 39.1 ° C.
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The night of August 9-10 was the mildest since the start of the year nationwide, averaging just over 20 ° C on the national thermal indicator. "A value reached only once between 1947 and 2002, 21 times since 2003", noted forecaster Gaétan Heymes on Twitter.
#canicule
The night of August 9 to 10 was provisionally the mildest of the year, "tropical" even across the country with an average of just over 20 ° C on the national thermal indicator. A value reached only once between 1947 and 2002, 21 times since 2003 pic.twitter.com/7llj8F05Zs
On Friday, the weather will be unstable in the North, drier in the South, according to Météo-France forecasts. The rainstorm disturbance from the previous day will continue to rise overnight, causing showers and a few thunderclaps in the northern half.
The maximum temperatures will finally drop in the eastern half, with 24 to 30 degrees. On the Mediterranean rim, it will be up to 33 degrees. In the western half, temperatures will range from 21 to 29 degrees from La Manche to Occitanie.