Nighttime temperature and human sleep loss in a changing climate

This study linked nighttime temperature anomalies with insufficient sleep using data from 765,000 U.S. residents between 2002–2011. A 1°C increase in nighttime temperature resulted in approximately three additional nights of insufficient sleep per 100 individuals monthly. Effects were most pronounced in summer, among elderly and low-income populations, highlighting vulnerability to heat. Projections suggest climate change may significantly increase sleep loss by 2050 and 2099, affecting cognitive function and health on a large scale.

To mitigate heat-related sleep disturbances, use air conditioning or fans, optimize bedroom ventilation, and maintain hydration. Focus on strategies to reduce room temperature during summer. Vulnerable populations, such as the elderly, should prioritize cooling measures as heat effects will intensify with climate change.