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Last updated 14 Sep 2026

Urban Heat Islands effect

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Urban heat
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Introduction

Urban areas are particularly vulnerable to heat due to higher temperatures during the summer, as buildings, roads, and other infrastructures absorb solar energy. A particular phenomenon is responsible for this: the urban heat island effect.

Urban heat islands occur when human activity and construction create higher temperatures in urban areas than the surrounding landscape. Global warming heralds more heat waves, exacerbated by heat islands and posing severe health risks to residents.

Find out how the urban heat island effect works.

Themes
Urban risk and planning

Knowledge base

Update
17 août 2021
France: comment l'îlot de chaleur urbain transforme nos métropoles

A l'aide des données inédites fournies par des chercheurs du CNRS et de Météo France, franceinfo passe au crible les degrés d'exposition à l'îlot de chaleur urbain de 42 zones urbaines françaises.

France Info

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