Rising Temperatures Pose Significant Risk to Older Adults
A new study published in The Lancet Planetary Health estimates that with a global warming of 1.5 degrees, 22% of adults over 60 will be exposed to dangerous heat for at least a month every year.
As the planet continues to warm, the consequences for human health are becoming increasingly apparent. Older adults, in particular, are more susceptible to heat-related illnesses due to their reduced ability to regulate their body temperature. A recent study has found that the number of older adults at risk of heat-related illnesses will increase significantly with rising temperatures.
Heat Stress and Older Adults
The study, which combined population projections and climate models, estimates that with a global warming of 1.5 degrees, 290 million older adults will be at risk of heat stress. This is because older adults have a lower threshold for tolerating heat, with their bodies less able to cool themselves through sweating and other mechanisms. As a result, they are more likely to experience heat-related illnesses, which can be fatal if left untreated.
Global Warming and Heat Exposure
The study found that for every degree of global warming, approximately 1 billion more people will be exposed to at least 180 hours of extreme heat per year. The risk of heat stress is not evenly distributed, with older adults facing the greatest danger. The authors of the study note that the effects of heat stress will be felt most strongly in regions with high populations of older adults, such as the Indo-Gangetic plain and the Gulf Coast.
Regional Variations in Heat Stress
The study identified several regions that will be particularly vulnerable to heat stress, including the southern United States, Africa, and Southeast Asia. These regions will experience extreme heat for longer periods, with the heat index reaching dangerous levels for several months at a time. The authors note that the heat stress will not only affect human health but also have significant economic and social impacts, including reduced productivity and increased migration.
Mitigating the Effects of Heat Stress
To mitigate the effects of heat stress, the authors recommend that cities be designed with heat resistance in mind, including the provision of green spaces and cooling systems. They also call for the development of early warning systems and public education campaigns to inform older adults of the risks of heat stress and the steps they can take to protect themselves. By taking these steps, it may be possible to reduce the impact of heat stress on older adults and save lives.
