ArticleEnvironment international2024
Impact of heatwaves on all-cause mortality in India: A comprehensive multi-city study.
Article in Environment international, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.
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14 citing papers in PubMed.
- Urban environment, health, and equity: A population-based study of symptoms and annoyances related to air pollution, traffic noise, and greenness.Environmental epidemiology (Philadelphia, Pa.) · 2026Article
- Association between first trimester ambient temperature and the risk of gestational hypertension and pre-eclampsia: Insights from the PRECISE study cohort in The Gambia, Kenya and Mozambique.Research square · 2026Article
- Historical and future extremes of cauvery basin analysed using cmip6 models and ETCCDI indices.Scientific reports · 2026Article
- Global historical population exposure to heating and cooling degree days.Scientific reports · 2026Article
- Anthropogenic climate change drives rising global heat stress and its spatial inequality.Nature communications · 2026Article
- Extreme temperature events and their relationship with excess all-cause mortality in Chandigarh, India.Scientific reports · 2026Article
- Public health consequences of global climate change. A narrative review.Frontiers in cellular and infection microbiology · 2026Review
- To gain insights into heat adaptations among women during the antenatal period in India -The Heat in Pregnancy Project (HiP-I) India- Qualitative Study Protocol.Wellcome open research · 2026Article
- Association of ambient temperature with mortality in community-based patients with severe mental disorders: a time-stratified case-crossover study in western China.BMC psychiatry · 2025Article
- Symptoms of heat stress predict changes in serum creatinine among rural patients with chronic kidney disease during heatwave conditions in Northern India.BMC nephrology · 2025Observational
- Heat action plans in eight Indian cities: Knowledge gaps & opportunities for intersectoral heat governance.The Indian journal of medical research · 2025Article
- Need for a Holistic Approach to Assessing Sustainable, Green, and Healthy Buildings.Environment & health (Washington, D.C.) · 2025Review
- Towards climate-responsive cities: developing a heat vulnerability index for Jodhpur City, India.The journal of climate change and healthArticle
- Burden of Deaths and Disability-adjusted Life Years Attributable to Suboptimal High Temperature in India: Analysis of the Global Burden of Disease Estimates (1990-2021).Indian journal of community medicine : official publication of Indian Association of Preventive & Social MedicineArticle
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Abstract
backgroundHeatwaves are expected to increase with climate change, posing a significant threat to population health. In India, with the world's largest population, heatwaves occur annually but have not been comprehensively studied. Accordingly, we evaluated the association between heatwaves and all-cause mortality and quantifying the attributable mortality fraction in India.
methodsWe obtained all-cause mortality counts for ten cities in India (2008-2019) and estimated daily mean temperatures from satellite data. Our main extreme heatwave was defined as two-consecutive days with an intensity above the 97th annual percentile. We estimated city-specific heatwave associations through generalised additive Poisson regression models, and meta-analysed the associations. We reported effects as the percentage change in daily mortality, with 95% confidence intervals (CI), comparing heatwave vs non-heatwave days. We further evaluated heatwaves using different percentiles (95th, 97th, 99th) for one, two, three and five-consecutive days. We also evaluated the influence of heatwave duration, intensity and timing in the summer season on heatwave mortality, and estimated the number of heatwave-related deaths.
findingsAmong ∼ 3.6 million deaths, we observed that temperatures above 97th percentile for 2-consecutive days was associated with a 14.7 % (95 %CI, 10.3; 19.3) increase in daily mortality. Alternative heatwave definitions with higher percentiles and longer duration resulted in stronger relative risks. Furthermore, we observed stronger associations between heatwaves and mortality with higher heatwave intensity. We estimated that around 1116 deaths annually (95 %CI, 861; 1361) were attributed to heatwaves. Shorter and less intense definitions of heatwaves resulted in a higher estimated burden of heatwave-related deaths.
conclusionsWe found strong evidence of heatwave impacts on daily mortality. Longer and more intense heatwaves were linked to an increased mortality risk, however, resulted in a lower burden of heatwave-related deaths. Both definitions and the burden associated with each heatwave definition should be incorporated into planning and decision-making processes for policymakers.
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