Key Points

• Since Friday, June 20, 2025, due to extreme heat, Météo-France has placed two departments under an orange alert—Isère and Rhône (39.1% of the region’s resident population)—and ten departments under a yellow alert (60.9% of the region’s resident population). Allier, Cantal, and Puy-de-Dôme were removed from the yellow alert on Monday, June 23, 2025.

• A regional analysis of emergency care utilization indicates an increase in the iCanicule composite health indicator (including hyperthermia, dehydration, and hyponatremia) since the start of the heatwave.

• This trend falls within the expected fluctuations for the current weather conditions.