A new study by Professor Kai Zhang and Assistant Professor Feinuo Sun indicates that sustained exposure to extreme heat and cold is linked to an increased risk of high-impact chronic pain in older adults. The research, published in 2026, tracked more than 35,000 adults over age 50 across a 20-year period, comparing their health reports to local temperature records. Researchers defined high-impact chronic pain as pain lasting at least three months that limits a person’s ability to work, socialize, or perform self-care.
The study found that the impact of temperature varies significantly by geography and economic status. For urban residents, sustained heat showed no link to developing new pain, whereas rural residents showed a stronger connection. Similarly, the poorest older adults experienced a higher chance of developing high-impact pain following sustained heat exposure, while the wealthiest residents did not. The researchers attributed these differences to factors such as access to air conditioning and the quality of housing.
According to the findings, rural residents may be the least protected from extreme weather. Rural homes are often older and more difficult to cool, and energy costs typically consume a larger share of household income in these areas. Additionally, the study noted that the agricultural workforce is aging, with the average farm producer at approximately 58 years old and nearly 40% of farmland owned by individuals aged 65 or older.
On a broader scale, the research highlights a gap in current public health infrastructure, which primarily directs heat-relief resources like cooling centers and tree canopy programs toward urban centers. For residents in rural districts, the daily reality involves navigating older housing and traveling longer distances to reaching medical care as rural hospitals close. A resident in Maine would notice these effects when temperatures exceed 84 degrees Fahrenheit, while a resident in Houston would see the same impact when temperatures hit 96 degrees, representing the top 5% of heat for their respective regions. These residents may experience stiffer joints and weaker muscles as heat-induced dehydration and lack of sleep lead to reduced physical activity.
The knock-on effects of these findings could influence how state and county governments draft future heat plans, which currently prioritize heart and lung conditions but do not officially recognize chronic pain as a heat-related risk. This study sets a precedent for including housing quality and local climate data in clinical pain histories. Next, the researchers suggest that cooling assistance programs should be redesigned to focus on weatherization and energy assistance specifically for rural homes. While global temperatures continue to rise, the immediate focus remains on whether public health officials will incorporate these findings into official weather warnings and clinical diagnostic procedures.