Key Points

• The region has been experiencing another heat wave since July 29, 2026: ten departments have been placed under an orange heat wave alert (Ain, Ardèche, Drôme, Isère, Loire, Haute-Loire, Puy-de-Dôme, Rhône, Savoie, and Haute-Savoie). On August 7, 2026, only Drôme and Ardèche remained under an orange heat wave alert. The very next day, the number of affected departments rose again, reaching eight departments under an orange heat wave alert by August 11, 2026 (Ain, Allier, Ardèche, Drôme, Isère, Rhône, Savoie, and Haute-Savoie).
• Since July 29, the values of the iCanicule composite health indicator (which includes cases of hyperthermia, dehydration, and hyponatremia) have remained stable at levels lower than those observed during the two previous heat waves.