Key Points

• From August 11, 2025, to August 16, 2025, amid a heat wave, Météo-France classified 5 departments as under an orange alert (83.2% of the regional resident population) and 1 department as under a yellow alert (16.8% of the regional resident population).

• A regional analysis of emergency care utilization indicates an increase in hospital emergency departments in the composite health indicator iCanicule (including hyperthermia, dehydration, and hyponatremia) across all age groups during the heatwave compared to typically observed values.

• This trend falls within the expected fluctuations for the meteorological conditions during the episode and was particularly observable in the departments of Cher, Eure-et-Loir, and Loiret.