Temperatures will increase abnormally during the summer, over the next thirty years, according to an INSEE study published on August 30th.
The French will experience between 16 and 29 abnormally hot days between June and August, compared to 16 days in the years 1976-2005.
These heat anomalies will be more frequent in the Auvergne-Rhône-Alpes, Bourgogne-Franche-Comté and Occitanie regions, where 9.3 million people currently reside.
That is one inhabitant in seven who will be affected by more than 20 abnormally hot days.
“
During the period 1976-2005, no inhabitant was exposed to such anomalies
,” the report states.
Frequency of abnormally hot days and nights for the periods 1976-2005 and 2021-2050 INSEE / Météo-France, Drias 2020.
The coasts, the only territory slightly spared
The rest of the territory is not spared by this phenomenon, since two thirds of the population of metropolitan France (65%) reside in territories where there will be "
16 to 20 abnormally hot days
".
However, the coasts will be less impacted.
In Brittany, Corsica, Provence-Alpes-Côte d'Azur and Normandy, for example, the population will experience more than 15 abnormally hot days over the next few decades.
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According to the study, the repetition of these hot days, associated with nights "
where the temperatures remain high
", "
increases the health risks
".
The elderly are particularly at greater risk.
"
Currently, 880,000 people aged 75 or over [...] live in the territories that will be most exposed during the day
".
More than one million people living below the poverty line are also victims of the consequences of global warming.
In particular due to poor insulation of housing.