Home Database Indicators Exposure of vulnerable populations to heatwaves
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Exposure of vulnerable populations to heatwaves


Exposure to extremes of heat results in a range of health consequences, including heat stress and heat stroke, worsening heart disease, and acute kidney injury. Populations over 65, particularly vulnerable to these effects, are being exposed to heatwaves in increasing numbers. This indicator tracks the change in the number of heatwaves experienced by vulnerable populations around the world.


As two distinct sources were used for population data, there may be some inconsistencies between the pre- and post-2000 values.

Reference information

  • ERA5 reanalysis, 2020. European Centre for Medium-Range Weather Forecasts

  • Gridded Population of the World. 4 ed (GPWv4), 2020. NASA

  • Histsoc dataset, 2020. Inter-Sectoral Impact Model Intercomparison Project

  • 2019 Revision of World Population Prospects, 2020. United Nations DESA/Population Division
The Lancet Countdown: Tracking Progress on Health and Climate Change

Published in Climate-ADAPT Feb 09 2021   -   Last Modified in Climate-ADAPT Sep 10 2022

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