In the future, it may be possible to predict the phenomena of devastating rains thanks to water vapor measurements taken at sea.

They usually strike in the fall. But with global warming, Cevennes episodes – during which several weeks of rains can fall in a few hours – could well become more frequent. The most recent hit the Gard, Lozère and Southern Corsica hard, around mid-June, causing severe flooding. At this time of year, this kind of event is extremely rare. For scientists, it becomes necessary to refine the weather forecast. This is why experts from the University Space Center (CSU) of Montpellier, ENSTA, IGN and Météo France are preparing to test a new detection system.

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