Key Points

Heat-related health issues

• In Brittany, the heatwave began on Thursday, June 19: Ille-et-Vilaine and Morbihan were placed under a yellow heatwave alert. On Friday, June 20, these two departments were placed under an orange heat wave alert, while Côtes d’Armor and Finistère were placed under a yellow alert until Saturday, June 21. On Sunday, June 22, all Breton departments returned to a green alert.

• An increase in indicators for heat-related illnesses was observed alongside the rise in temperatures during the heatwave.

Allergies

• New peak in hospital emergency room visits in week 25. The Capt’air Bretagne association maintains a high risk for grass pollen in week 24.

COVID-19

• The COVID-19 booster vaccination campaign for vulnerable individuals continues through June 14, 2025.