A recent study suggests that the temperature inside a person’s home may have a bigger effect on brain health than many people realize, especially for older adults.
Researchers found that when indoor temperatures become too hot or too cold, older people may have more difficulty paying attention and thinking clearly.
The findings are raising concerns about how climate change could affect aging populations in the future.
As global temperatures continue to rise and extreme weather becomes more common, scientists believe protecting older adults from unsafe indoor temperatures may become increasingly important for both physical and mental health.
The study was carried out by researchers at the Hinda and Arthur Marcus Institute for Aging Research, which is part of Hebrew SeniorLife and connected with Harvard Medical School. The research team wanted to better understand how indoor living conditions affect brain function in older adults.
To study this, the scientists followed 47 adults aged 65 and older over a one-year period. They carefully monitored the temperatures inside the participants’ homes and regularly asked them questions about their ability to focus and pay attention.
The researchers discovered that older adults experienced the fewest attention problems when indoor temperatures stayed between 68 and 75 degrees Fahrenheit, which is around 20 to 24 degrees Celsius.
However, when temperatures moved just seven degrees Fahrenheit, or about four degrees Celsius, above or below this range, the chances of experiencing attention difficulties doubled. This suggests that even relatively small temperature changes may affect brain performance in older adults.
The findings show how sensitive the aging brain may be to environmental conditions. As people grow older, the body often becomes less effective at controlling temperature and responding to heat or cold stress.
Older adults may sweat less, feel thirst less strongly, or struggle more to adjust to temperature changes. These physical changes may also affect brain function.
Researchers say that maintaining a stable indoor temperature could play an important role in helping older adults stay mentally sharp and independent.
The study also highlighted a major social concern. Many older adults already live in homes that are too hot during summer or too cold during winter. This problem may be especially serious for people with low incomes who cannot afford reliable heating or cooling systems.
Without proper temperature control, these individuals may face greater risks of memory problems, confusion, and trouble concentrating. Scientists worry that climate change could increase these risks in the coming decades as heat waves and extreme weather events become more frequent.
Dr. Amir Baniassadi, the lead author of the study, explained that making sure older adults have access to temperature-controlled housing may become an important way to protect brain health in the future.
The study also supports earlier research showing that temperature can affect sleep quality, mood, and thinking ability in older adults. Poor sleep caused by uncomfortable temperatures may further worsen attention and memory problems over time.
Scientists believe the findings should encourage governments, healthcare systems, and communities to think more carefully about housing conditions for aging populations.
The researchers suggested several possible solutions. One idea is improving housing systems so they can better handle extreme weather conditions.
Another is making heating and cooling technologies more affordable and energy-efficient. Smart home systems that automatically adjust indoor temperatures may also help older adults maintain safer living environments.
The research team included experts such as Dr. Lewis Lipsitz and Dr. Brad Manor, who believe the study shows that climate change affects more than just the body. It may also directly affect the brain and mental function.
As the global population continues to age, protecting cognitive health is becoming increasingly important. Problems with memory, focus, and thinking can greatly affect quality of life and independence in older adults.
The researchers hope the study encourages more public health planning around safe housing and climate adaptation. They believe families, doctors, policymakers, and communities all have a role to play in protecting older adults from harmful environmental conditions.
The study also serves as a reminder that brain health is connected to many everyday factors, including sleep, nutrition, exercise, stress, and even the temperature of the spaces where people live.
Scientists continue studying other ways to support healthy brain aging as well. Previous research has suggested that regular exercise, healthy diets such as the MIND diet, reducing inflammation, and maintaining healthy vitamin D levels may help protect cognitive function as people age.
Although this study was relatively small, its findings match a growing body of evidence showing that climate and environmental conditions can strongly affect human health.
If you care about brain health ,please read studies about Vitamin B9 deficiency linked to higher dementia risk, and cranberries could help boost memory.
For more health information, please see recent studies about heartburn drugs that could increase risk of dementia, and results showing this MIND diet may protect your cognitive function, prevent dementia.
The full study was published in The Journals of Gerontology, Series A: Biological Sciences and Medical Sciences.
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