Key Points

• From June 20 to 21, 2025, Météo-France issued an orange alert for extreme heat in the Manche department and a yellow alert for the four other departments in Normandy.

• A regional analysis of emergency care utilization indicates a significant increase in the iCanicule composite health indicator (including heatstroke/hyperthermia, dehydration, and hyponatremia) over the two days of the heatwave.