Summer nights are warming across the U.S. due to climate change, according to a new study. Some areas are warming by more than 10 degrees on average, which can come with serious health risks.

Recent data shows that summer nights across the United States have warmed by more than 3 degrees on average, with some regions experiencing even greater increases. Cities such as Reno, Nevada, have seen nighttime temperatures rise by as much as 17 degrees since 1970, while other cities like Las Vegas, El Paso, Salt Lake City, and Boise have recorded increases between 7 and 10 degrees.

Experts highlight that heat is the leading cause of weather-related deaths, and warmer nights can be particularly dangerous. Nighttime is typically when the body recovers from daytime heat, but higher overnight temperatures increase health risks, especially for those without access to air conditioning.

Summer nights are sizzling and getting warmer

As our climate warms, we aren't just talking about warmer days, but nights as well. The data tells a compelling story. Summer nights across the U.S. have warmed by more than 3 degrees on average, but in certain regions, that number is dramatically higher. Consider Reno, Nevada, where nights have warmed by an astonishing 17 degrees since 1970, and in Las Vegas, El Paso, Salt Lake City, and Boise, overnight temperatures have climbed between 7 and 10 degrees. This matters because heat is the number one killer when it comes to weather, and a significant amount of these deaths are because of warm overnight temperatures. You see, the nighttime hours are critical when our bodies recover from the day's heat stress, and for those most vulnerable without A.C., these warming nights pose a significant risk.

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