During a heatwave, the aim is not to turn a home into a refrigerator: it is to reduce heat entering the space and protect people who are more vulnerable. The most useful actions happen before the hottest hours.
Close in daytime, air out when it cools
Close shutters, blinds or curtains on sun-facing windows before rooms heat up. Ventilate early in the morning or at night only when outside air is cooler, then close up again. A fan can improve comfort but does not replace hydration or access to a cool place during extreme heat.
Useful priorities
- Drink regularly rather than waiting to feel thirsty.
- Avoid physical exertion in the hottest hours.
- Check on isolated, older or unwell relatives and neighbours.
- Follow official weather alerts and local advice.
When to seek help
Symptoms such as fainting, confusion, unusual weakness or breathing difficulty need prompt action and medical advice. For general weather-safety guidance, see Météo-France and local public-health messages.