Key Points

• Regional analysis of emergency care utilization indicates an increase in the iCanicule composite health indicator (including hyperthermia, dehydration, and hyponatremia) during the heat wave for all age groups.

• In hospital emergency departments, compared to the 3-week reference period preceding the heat wave (July 7–28, 2024), an increase in emergency care utilization was also observed for the iCanicules indicator across all age groups and among people aged 15–74.