Older adults face significantly greater risks from rising temperatures than previously estimated, according to new research published in The Lancet Planetary Health.
Stanford University researchers found that earlier studies often relied on young, healthy participants and failed to account for the reduced ability of people over 60 to regulate body temperature.
The study projects that at 1.5 degrees Celsius of global warming, about 22 percent of adults—roughly 290 million people—could experience unsafe heat for at least one month each year.
Older populations in tropical and rapidly warming regions are expected to be particularly vulnerable.
The findings highlight the importance of limiting further global warming through reductions in greenhouse gas emissions. Experts said continued temperature increases could make extreme heat increasingly dangerous, particularly for ageing populations.
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