Extreme heat is a growing concern, especially for older adults, as a new study from the USC Leonard Davis School of Gerontology suggests that prolonged exposure to high temperatures may accelerate biological aging. This raises alarming questions about the impact of climate change and heat waves on long-term health and aging at a molecular level.
The research, published in the journal Science Advances, found that individuals living in neighborhoods with more frequent high heat days showed signs of greater biological aging compared to those in cooler regions. Biological age, which measures how well the body functions at a molecular level, was found to be higher in individuals exposed to extreme heat, even after accounting for demographic and lifestyle factors.
The study analyzed data from over 3,600 participants aged 56 and older, tracking changes in biological age through epigenetic markers in blood samples over a six-year period. Epigenetic clocks were used to measure DNA methylation patterns and estimate biological age at different time points. The analysis revealed a significant correlation between the number of extreme heat days in a region and accelerated biological aging in individuals residing there.
Older adults are particularly vulnerable to the effects of high heat, as the body’s ability to regulate temperature decreases with age. The combination of heat and humidity poses a greater risk, as older adults may struggle to cool down effectively. The study emphasized the importance of considering heat mitigation strategies and age-friendly infrastructure in urban planning to protect vulnerable populations.
Moving forward, researchers aim to identify additional factors that may contribute to heat-related biological aging and explore its connection to clinical outcomes. The study results serve as a reminder for policymakers and city planners to prioritize heat mitigation measures and create environments that are resilient to the impacts of climate change.
In conclusion, the study highlights the urgent need for proactive measures to address the health implications of extreme heat, particularly for older adults. By understanding the link between heat exposure and biological aging, we can work towards creating healthier and more sustainable communities for all individuals.
