France's heat wave drives health risks, soaring AC electricity costs and DIY cooling tips

Extreme temperatures across France have sparked a wave of health warnings and practical advice. The World Health Organization notes that fans become ineffective or even hazardous when ambient temperatures exceed 35 °C, especially for seniors, children and those with chronic illnesses. Correct fan placement—pointing toward an open window or a wall rather than directly at the body—and combining fans with cool water sources (e.g., a wet sheet) can mitigate the danger.

Nighttime heat is proving more lethal than daytime peaks. Meteorologists warn that nocturnal temperatures staying above 20‑25 °C prevent the body from cooling, leading to sleep disruption, increased fatigue and heightened risk of cardiac events. Simple measures such as opening windows at the hour when outdoor air first falls below indoor temperatures, using a damp sheet, or applying a white Meudon paste to windows can lower indoor heat by several degrees.

The surge in demand for cooling devices is also straining the electricity system. With air‑conditioners operating at maximum capacity, wholesale electricity prices have risen sharply, a phenomenon dubbed the “refrigeration crisis.” Depending on the equipment, running a split‑system AC 24 hours can cost between €2.3 and €5.6 per day under current tariffs. Even portable fans and ceiling fans are seeing price drops, such as Amazon’s discount on the Create Windcalm ceiling fan ahead of Prime Day.

Consumers are turning to low‑cost alternatives: evaporative cooling, strategic ventilation, and inexpensive home‑made solutions. The combined impact of health advice, energy price pressures and DIY cooling strategies shapes France’s response to the ongoing heat wave.