Extreme heat more dangerous for people 60 and over than previously thought — SkimNews
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- Lancet Public Health study led by Stanford health academics found people aged 60 and over experience uncompensable heat stress at just 1.5°C of warming above preindustrial levels, compared with 4°C for younger adults aged 15–39.
- Previous heat-stress research misapplied thresholds calibrated to younger adults' physiology across all age groups, overlooking older adults' reduced sweating, harder-working hearts and less elastic blood vessels, the study says.
- Global population aged 60 and over is projected to double to 2.1 billion by 2050, and each additional degree of warming exposes roughly one million more people to at least 180 hours of uncompensable heat stress annually — a burden falling disproportionately on older adults.
- UK Health Security Agency reported that the four-day May heatwave and eight-day June heatwave in Britain in 2026 together caused 2,877 excess deaths, nearly double the 1,504 recorded across all of summer 2025.
- Dr Simon Williams of Swansea University called the findings "very significant," warning that heatwaves "have unequal health impacts, with older adults particularly vulnerable" at risk of "harmful and potentially fatal heat stress."
- Caroline Abrahams of Age UK said the study means "there's now no denying that extreme heat poses a very real health threat to our older population," while Dr Hilary Williams of the Royal College of Physicians noted a hospital geriatric ward reached 36°C during this summer's heat.
- Low- and middle-income countries like India and Pakistan face disproportionate exposure, and parts of the tropics and subtropics risk becoming uninhabitable — especially for older people — if heating continues to escalate.
Why it matters: Older adults' heat vulnerability has been systematically underestimated because past research used thresholds calibrated on younger bodies. With the 60+ population on track to double to 2.1 billion by 2050 and warming already approaching 1.5°C, the UK — where 2026's heatwaves already caused nearly double the excess deaths of 2025 — illustrates how adaptation policies built on younger-adult thresholds are already dangerously out of date.
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