Global Warming Poses Greater Threat Than Expected to Older Adults, Study Finds

Global warming is poised to expose the elderly to dangerously high temperatures in the coming decades, exceeding previous predictions, a study published Tuesday in The Lancet Planetary Health reveals. The findings are particularly relevant as Europe and North America are currently experiencing exceptionally hot summers.

Researchers from Stanford University in the United States developed models to assess the extent to which global warming will expose individuals over 60 to intolerable temperatures by 2100. While this area of research is established, the study's authors caution that previous assessments might have underestimated the risks for older adults, partly due to relying on outdated data.

A critical indicator used in the study is 'wet-bulb temperature,' which accounts for both heat and humidity. A higher wet-bulb temperature signifies a greater danger. Historically, the risks associated with specific wet-bulb temperature levels were primarily measured on young, healthy individuals. However, more recent research, including older populations, indicates that the dangers for this group have been underestimated.

By integrating this newer understanding and considering the projected aging of the global population, the study's authors concluded that "intolerable heat will affect many more people than previously estimated, on a much larger scale and for longer periods." For instance, their models suggest that if the world warms by 1.5°C compared to pre-industrial levels by 2100, 22% of people over 60 could face dangerous heat for over a month each year. The researchers urged for measures that improve access to resources like air conditioning and called for reductions in carbon emissions, highlighting that countries with large populations lacking resources to cope with heat are at the highest risk.

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intolerable heat will affect many more people than previously estimated, on a much larger scale and for longer periods.