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Extreme Heat and Ageing
July 3 , 2025
10 hrs 0 min
14
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- New research shows that the extreme heat may silently speed up ageing at the molecular level.
- The Scientists compared the impact of heat to major risk factors like smoking and heavy alcohol use.
- The study used “epigenetic clocks” – tools that measure changes in DNA.
- These clocks track DNA methylation.
- It is a process that can turn genes on or off and is affected by the environment.
- People living in areas with 140+ hot days a year (over 90°F or 32.3°C) showed up to 14 months of extra biological ageing.
- This ageing effect remained even after considering the lifestyle and economic differences.
- The Animals also show that the heat causes the long-term changes in DNA, called maladaptive epigenetic memory.
- The findings raise concerns about how climate change may harm long-term health through faster biological ageing.
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