Key Points

• Amid this heatwave, Météo-France issued the following alert: All departments (Paris, Seine-et-Marne, Yvelines, Essonne, Hauts-de-Seine, Seine-Saint-Denis, Val-de-Marne, Val-d’Oise) in the Île-de-France region were placed under a yellow alert on Friday, June 28, 2025. As of June 29, 2025, all eight departments in the Île-de-France region were placed under an orange heat wave alert. On June 30, 2025, Météo-France announced that all departments in the region were placed under a red heat wave alert effective at 12:00 PM on July 1, 2025.

• A regional analysis of emergency care utilization indicates an increase in visits and a stable rate of hospitalizations following emergency room visits for the composite health indicator iCanicule (including hyperthermia, dehydration, and hyponatremia) during the period from June 29, 2025, to June 30, 2025.

• The regional analysis of SOS Médecins consultations also indicates an increase in the composite health indicator iCanicule (heatstroke, dehydration) throughout the entire episode

• This trend falls within the expected fluctuations for the current weather conditions and is observable across the region as a whole.