A national heatwave plan has been activated to help people stay cool during the Netherlands’ increasingly hot summers

Households in Amsterdam are being urged to hang their curtains outside their windows as health experts recommend simple hacks to moderate the heatwave rolling across the Netherlands, where homes were built for old-fashioned damp and coldish northern European weather.

In a viral social media post last week, Eline Coolen, the heat coordinator at the city’s public health institute, urged sweaty city-dwellers to rig up temporary curtain rails or drape curtains or sheets outside to stop the sun’s rays reaching their large windows.