Heatwave guidance: practical home cooling and hydration tips

Across several European and South American outlets, health experts and media outlets shared advice for coping with the current heatwave. Traditional tricks such as fine water sprays on the skin, wet cloths on the neck or wrists, and hanging a damp sheet in front of an open window are recommended for immediate cooling. Ventilation is emphasized, but windows should stay closed during the hottest part of the day and be opened only when outside temperatures drop.

Energy‑saving measures include turning off unnecessary heat‑generating appliances, using fans wisely (avoiding direct airflow on the face overnight) and setting air‑conditioners no lower than 26 °C to prevent thermal shock. Experts warn against cold showers or ice‑cold drinks, which can cause blood‑vessel constriction and raise core temperature. Instead, temperate water and moderate fluid intake are advised.

Hydration recommendations differ from the generic “eight glasses” rule. The French Ministry of Health and nutritionists cite EFSA guidelines: about 2 L of water per day for women and 2.5 L for men, adjusted for diet, body size and activity level. Those with low‑water diets may need up to 1.8 L (roughly nine 200 ml glasses). Vulnerable groups—children, the elderly and people with chronic illnesses—should monitor urine colour and seek medical advice if unsure.

The World Health Organization notes that European heatwaves are becoming more frequent, longer and more intense, underscoring the importance of these preventive measures for public health.