Each degree of warming could add a month of intolerable heat for 1 billion people
The threat that rising temperatures fueled by climate change pose to the health of older people has been dramatically underestimated, according to a U.S. modeling study published Tuesday.
A recent U.S. modeling study published in The Lancet Planetary Health reveals the significant threat rising temperatures pose to the health of older people. Previous estimates have underestimated this risk, as they often used wet-bulb temperature measurements derived from young, healthy adults. However, this new research acknowledges that older individuals, who are more prone to heat-related health issues, are far more vulnerable.
By incorporating data from recent wet-bulb experiments involving people over 60, the study projected how heat will impact various age groups by 2100 under different levels of global warming. The findings indicate that if global temperatures rise by 1.5°C above preindustrial levels, 22% of people aged 60 and above will be exposed to unsafe heat conditions for at least one month each year globally.
Each additional degree of warming would subject an estimated one billion more individuals to an additional month of intolerable heat and humidity. The most severe impact is anticipated in South Asia and the Gulf, where older people may endure dangerous heat conditions for three consecutive months annually. Countries with high poverty rates and limited access to cooling facilities, such as India, Pakistan, Bangladesh, Myanmar, and Niger, face the greatest threat.
The study warns that uncompensable heat could lead to increased internal displacement and transboundary climate migration, creating new policy and humanitarian challenges. To mitigate these grim scenarios, the researchers urge the world to drastically reduce greenhouse gas emissions and prioritize vulnerable older people in future heat mitigation plans.
Access to air conditioning and other cooling facilities is particularly crucial, as most heat-related deaths occur indoors. Wildfires, prolonged heatwaves, and drought have recently ravaged Europe, which is experiencing its hottest summer on record and is expected to be the world's fastest-warming continent.
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