Key Points

• A heat wave has been underway since July 10, 2022. Météo-France placed the four departments of Brittany under an orange alert on July 16, then under a red alert on July 17 and 18.

• Total healthcare utilization: No increase between July 16, 2022, and July 18, 2022, in emergency care utilization (hospital and SOS Médecins) for all ages and for those aged 75 and older.

• Healthcare utilization for the iCanicule composite indicator: An increase between July 16 and July 18, 2022, in the proportion of SOS Médecins procedures for iCanicule among coded procedures (all ages). On July 18, a peak in SOS Médecins procedures for the composite indicator (iCanicule) (n = 10, representing 1.9% of coded diagnoses).