The Netherlands is experiencing more frequent and intense heat waves due to climate change, leading to increased health risks, particularly for vulnerable populations. The KNMI reports a significant rise in the average number of summer days, with temperatures of 25 degrees Celsius or higher.

Many Dutch homes are not adequately prepared for these high temperatures, often designed to retain heat rather than expel it. This can lead to indoor overheating, resulting in poor sleep, impaired concentration, and serious health problems, especially for the elderly, young children, and those with certain medical conditions.

Overheating occurs when the body’s temperature rises due to a hot environment and it cannot cool down effectively. Symptoms include decreased urine production, darker urine, fatigue, concentration problems, headache, nausea, and even loss of consciousness.

To prevent overheating, limit outdoor activity during the hottest hours of the day (11:00 to 17:00), avoid strenuous exercise, and stay hydrated. Regularly wet your face, neck, wrists, and legs, and use a wet washcloth or ice pack for cooling.

Protect loved ones by paying extra attention to vulnerable individuals, especially the elderly and young children. Encourage them to drink plenty of fluids and ensure their living spaces are adequately ventilated and cool.

Cool your home by preventing sunlight from entering and investing in good sun protection, such as awnings or shutters. Plant trees and shrubs around the house for natural shade and cooling through evaporation.

If using electrical cooling devices, opt for a ground source heat pump over air conditioning, as air conditioners are energy-intensive and often contain polluting gases. Fans can provide some relief by refreshing the air layer on the skin and promoting sweat evaporation.

Wear loose-fitting clothing made of light, breathable fabrics to allow sweat to evaporate effectively. The color of the clothing is less important than its breathability.

Stay hydrated by drinking at least two liters of fluid throughout the day, even if you don’t feel thirsty. Avoid sugary drinks, as they can mask thirst.

To sleep well in warm weather, avoid cold showers just before bed, as they can trigger the body to generate more heat. Shower with lukewarm water instead and use a cotton pajama to absorb sweat.