Key Points

• According to Météo France, a heat wave occurred from August 8, 2025, to August 17, 2025. All 12 departments in the region were under an orange heat warning, and four of them (Ardèche, Drôme, Isère, and Rhône) were under a red heat warning on August 12 and 13, 2025. As of August 17, 2025, the orange heatwave alert has been lifted across the entire region.

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

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