Key Points

• According to Météo France, the region’s third heat wave began on August 8, 2025, and affects all departments in the region.

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

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

• Heat poses a health risk to the entire population. The observed health impacts underscore the importance of implementing preventive measures to mitigate the effects of heat.