A systematic review of ambient heat and sleep in a warming climate

This systematic review explored how rising ambient temperatures affect sleep quality and quantity. The review found consistent evidence that higher nighttime temperatures negatively impact sleep duration and quality, with greater effects in warmer regions, during summer, and among vulnerable groups like older adults. Poor sleep, linked to impaired cognitive function and health, highlights the need for strategies to mitigate heat exposure as global temperatures rise, such as cooling technologies or better urban design.

To counter the effects of heat on sleep, consider using air conditioning or fans, optimizing bedroom ventilation, and using breathable bedding. Urban planning that incorporates green spaces and reflective surfaces may also help. While evidence strongly links heat to poor sleep, strategies should be tailored based on local climate and individual needs.