Climate Forecast: A Heat More Deadly Than the U.S. Has Ever Seen

People sleep in the shade in Manhattan's High Line Park on June 25, 2013 in New York City. Photographer: Mario Tama/Getty Images
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It’s not the heat. It’s the humidity. And the U.S. is on a path to regularly experience a deadly combination of the two the likes of which have only been recorded once on planet Earth.

That’s one of the findings in a report published today called “Risky Business,” commissioned by some of America’s top business leaders to put price tags on climate threats. For example, by the end of the century, between $238 billion and $507 billion of existing coastal property in the U.S. will likely be subsumed by rising seas, and crop yields in some breadbasket states may decline as much 70 percent.