Medscape December 26, 2025
TOPLINE:
Greater exposure to extreme heat days (temperature > 100 °F) was associated with a higher prevalence of mental health issues, including anxiety and depression, across all US states than lower exposure, a new study showed.
METHODOLOGY:
- The analysis included data from all 50 US states, collected from the CDC’s Heat and Health Tracker, National Center of Health Statistics, and US Census Bureau, to examine associations between extreme heat exposure and the prevalence of mental health outcomes.
- Researchers measured extreme heat exposure by the average number of extreme heat days during 4 months in the summer of 2020; mental health outcomes were assessed using state-level prevalence rates of depression and anxiety in 2022.
- Regression analyses controlled for demographic factors...







