A large-scale US study shows how even small spikes in temperature can erode sleep quality, especially for vulnerable groups. A new study from the University of Southern California has found a clear link between warmer weather and reduced sleep duration, along with poorer overall sleep quality. And the impact, researchers warn, is not evenly distributed across the population. Sleep deprivation is closely tied to a range of health concerns, including heart disease, weakened immunity, anxiety, and decreased cognitive function. The study suggests that environmental stressors like extreme heat may quietly magnify these problems on a population-wide scale. With global warming accelerating, the findings highlight an urgent need to rethink how we design living spaces, adapt public health strategies, and protect vulnerable communities. While a couple of minutes may sound insignificant, experts emphasize that the effect becomes severe when multiplied across seasons, heatwaves, and millions of individuals. The study analyzed an enormous dataset: more than 12 million nights of sleep, recorded by 14,232 adults across the United States. The findings reveal a consistent pattern: as temperatures rise, sleep time falls.
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