Long-term impacts of heatwaves on accelerated ageing

Siyi Chen, Yufei Liu, Yuanyuan Yi, Yiling Zheng, Jun Yang, Tiantian Li, Ta-Chien Chan, Rui Duan, Shenjing He and Cui Guo ()
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Siyi Chen: The University of Hong Kong
Yufei Liu: The University of Hong Kong
Yuanyuan Yi: The University of Hong Kong
Yiling Zheng: The University of Hong Kong
Jun Yang: Guangzhou Medical University
Tiantian Li: Chinese Center for Disease Control and Prevention
Ta-Chien Chan: Academia Sinica
Rui Duan: Harvard T.H. Chan School of Public Health
Shenjing He: The University of Hong Kong
Cui Guo: The University of Hong Kong

Nature Climate Change, 2025, vol. 15, issue 9, 1000-1007

Abstract: Abstract Climate change and population ageing are both urgent global challenges. Yet the interaction between these, such as associations between long-term exposure to heatwaves and biological age acceleration (BAA), is unclear. Here we analysed data from 24,922 adults in a longitudinal cohort in Taiwan (2008–2022) and used linear mixed models to show heatwaves accelerate ageing. Heatwaves were defined using both relative and absolute thresholds. BAA was calculated as the difference between biological and chronological age. Each interquartile range increase in the cumulative exposure to heatwaves was associated with a 0.023- to 0.031-year increase in BAA. Moreover, the participants demonstrated gradual adaptation to heatwave impacts over the 15-year period. Furthermore, manual workers, rural residents and participants from communities with fewer air conditioners were more susceptible to the health impacts. This study highlights the need for targeted policies and interventions to strengthen adaptive capacity, delay ageing and promote healthy ageing.

Date: 2025
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DOI: 10.1038/s41558-025-02407-w

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