London

Knowing the feels-like temperature (heat index) is essential. Humidity can make London feel much hotter than standard air readings indicate, increasing risk of exhaustion.

To avoid heat exhaustion or heat stroke during extreme weather, follow official public health guidance listed in our Heatwave Safety Guide.

How cooked are you in your daily setup? Take the quick Am I Cooked? Quiz to measure your custom score and check how you compare with other cities.