Where Data Tells the Story
© Voronoi 2025. All rights reserved.
Extreme heat kills approximately 2,700 people annually in Europe and the UK, and if global temperatures shoot past the Paris Agreement's 1.5°C target to 2.0°C, that number could climb to nearly 50,000 per year.
Cities have a key role to play in adapting to extreme heat, by expanding their urban tree canopy, which reduces ambient temperatures and decreases the heat island effect, where the built environment absorbs and amplifies extreme heat events.
In this visualisation, we look at the top 10 and bottom 10 European capital cities, ranked by share of urban tree cover, according to data from the European Environmental Agency.