Key Points

• Brittany experienced a heat wave during the first half of September 2023. During this period, biometeorological alert thresholds were exceeded in Ille-et-Vilaine. An impact on health was observed:

  • 27 SOS Médecins calls were recorded regionally for the iCanicule indicator, as well as 66 emergency room visits for the iCanicule indicator, 41 of which resulted in hospitalization. Emergency care visits accounted for up to 1.3% of daily SOS Médecins calls and 0.7% of daily emergency room visits. People aged 75 and older and those aged 15–74 were affected in nearly equal measure during this heatwave.

  • 14% of deaths observed during this episode are believed to be heat-related, with the majority occurring among those aged 75 and older.

• Link to the infographic