Extreme Heat Found to Accelerate Biological Aging in Older Adults

New research links prolonged exposure to high temperatures with faster cellular aging and increased health risks.

A University of Southern California study reveals that older adults in hot climates age biologically faster than those in cooler regions, with up to 14 months of additional aging observed in extreme heat conditions.
The study analyzed epigenetic changes in DNA from over 3,600 U.S. adults aged 56 and older, focusing on areas with frequent heat days exceeding 90°F.
Researchers found that heat exposure impacts biological aging at a level comparable to smoking and heavy alcohol consumption, even after controlling for lifestyle and socioeconomic factors.
Accelerated biological aging, linked to DNA methylation changes, raises the risk of age-related diseases such as cardiovascular issues, kidney dysfunction, and heat-related illnesses.
Experts emphasize the need for proactive urban planning and community interventions, such as adding shaded areas and checking on vulnerable populations, to mitigate the long-term health effects of a warming climate.