For much of the WHO European Region, we need to be prepared for a long, hot summer. Weather services are expecting the coming summer to be warmer and drier than usual in the Region. The public, medical professionals and public health authorities need to be prepared for heatwaves and to prevent and tackle the possible health consequences of heat exposure. This is particularly important this year due to the ongoing coronavirus disease (COVID-19) outbreak compounding issues caused by extended periods of hot weather, while many people, including groups particularly vulnerable to both the infection and heat, might be advised or required to remain at home as potential lockdowns are in place.