France heatwave drives home cooling advice, AC settings and hospital safety concerns

As temperatures peak across France, numerous guides advise residents on low‑cost ways to keep homes comfortable without air‑conditioning. Simple measures such as opening windows early in the morning and late in the evening, keeping shutters and curtains closed during the hottest hours, optimizing fan placement, using frozen water bowls, shielding rooms from direct sunlight and choosing breathable textiles can lower indoor temperatures by several degrees.

Home‑automation enthusiasts suggest that the open‑source platform Home Assistant can automate these actions. By pairing inexpensive temperature sensors, weather integrations and motorised shutters, the system can close blinds at the optimal moment, open windows when outdoor air is cooler and even control connected air‑conditioners or fans, reducing the need for manual adjustments.

Health authorities and energy agencies concur on a safe air‑conditioning set‑point: 26 °C, with an indoor‑outdoor temperature gap of no more than 5–7 °C. Setting units lower than this not only raises electricity consumption by roughly 7 % per degree but also risks thermal shock, especially for the elderly, infants and cardiovascular patients.

During the recent heatwave, an 84‑year‑old woman admitted to a northern French hospital died after her room reached 39 °C. A caregiver recalled, “Je mets le climatiseur en route… il y avait écrit 39 degrés… il n’y aura jamais de demain matin,” highlighting concerns over inadequate climate control in medical facilities.