Key Points

• During the week of August 11–17, Météo France issued an orange heat wave alert for the departments of Nord, Aisne, and Oise, as well as a yellow alert for Pas-de-Calais and Somme, for three consecutive days.

• A regional analysis of emergency care utilization indicates a moderate increase in the iCanicule composite health indicator (including hyperthermia, dehydration, and hyponatremia) during and around these three days of heatwave alerts.

• This trend shows fluctuations slightly higher than expected, even given the current weather conditions, but remains below the levels observed during the previous heat wave in late June–early July.