The link of extreme heat to biological aging has not been looked into with great depth. By contrast, the effects of extreme heat on health are much better understood. New research in 2025, first from the Leonard Davis School of Gerontology and then from the University of Hong Kong, point to the appearance that heatwaves accelerate aging, especially for manual labourers.
See the studies for more information:
Chen, S., Liu, Y., Yi, Y. et al. Long-term impacts of heatwaves on accelerated ageing. Nat. Clim. Chang. (2025). https://doi.org/10.1038/s41558-025-02407-w
Eun Young Choi, Jennifer A. Ailshire. Ambient outdoor heat and accelerated epigenetic aging among older adults in the US.Sci. Adv.11,eadr0616(2025) .DOI:10.1126/sciadv.adr0616 https://www.science.org/doi/10.1126/sciadv.adr0616