Why nighttime heat can be so dangerous -- and why it's getting worse | CNN

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Why nighttime heat can be so dangerous -- and why it's getting worse | CNN
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Heat waves are coming to include an increasingly dangerous element: overnight temperatures that don’t cool down enough to offer sufficient reprieve from oppressive heat, particularly for people without access to air conditioning.

Summers are getting hotter than ever, shattering all-time high temperature records, straining the energy grid and damaging critical infrastructure. Heat waves also are coming to include another increasingly dangerous element: overnight temperatures that don’t cool down enough to offer sufficient reprieve from oppressive heat, particularly for people without access to air conditioning.

Heat-related deaths could increase sixfold by the end of the century due to warmer nighttime temperatures, unless planet-warming pollution is significantly curbed, a 2022 study in the Lancet Planetary Health found. The climate crisis is already affecting people’s ability to sleep, said Minor, co-author of a study that found people living in warmer climates lose more sleep for each degree of temperature increase. It was published in May in the journal One Earth.

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