Study: Extreme heat will affect 107 million Americans in the future

In the United States, by the year 2053, some 107 million Americans will experience at least one day of extreme heat per year. It is a day when the wind chill is 52 degrees Celsius. By 2023, 8.1 million Americans will experience it at least one day a year, researchers at the First Street Foundation write in a new study.

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