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How Hot Can It Get, Literally? Scientists Weigh In


Four years of research following the 2021 western North American heat wave has revealed both the meteorological conditions that fuel extreme temperatures and evidence that heat has physical limits. The 2021 event "shocked everyone, including specialists working on the subject. People were completely...

People were completely stunned," said Robin Noyelle, a postdoctoral researcher in climate science at ETH Zurich.Scientists now focus on temperature departures from local averages rather than absolute readings. Research has identified five key factors that enable extreme heat: cloudless skies, high pressure, dark surfaces, lower altitudes, and lack of water. "Basically all of these conditions are met in Death Valley, but not in many other places in the world," said climate scientist Friederike Otto.

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