FILE - A person wipes sweat from their face as they exercise on the National Mall as temperatures reached 97 degrees Fahrenheit on August 12, 2021 in Washington, D.C. (Photo by Kevin Dietsch/Getty Images) More than 100 million Americans may experience a heat index higher than 125 degrees by 2053, according to a study published Monday by First Street Foundation.The 125-degree heat index is significant in that it marks the beginning of the National Weather Service's highest category for heat, known as "Extreme Danger." According to researchers, approximately 8 million Americans are expected to experience a heat index within the "Extreme Danger" category this year.
Researchers said that by 2053, that number is expected to increase to 107 million."There's really a regional story that came out of our research," said Jeremy Porter, chief research officer at the non-profit research and technology group.FILE - A heart-shaped sweat mark is seen on a man's shirt during a heatwave in New York, on June 29, 2021. (Photo by Michael Nagle/Xinhua via Getty Images) Porter specified that a vast area of the central U.S.
is more vulnerable to experiencing more days with a 125-degree heat index or higher. He added that this index translates to about 95 degrees with 80% relative humidity.
Other parts of the country may also be vulnerable to more days with higher heat index readings."Miami, for instance, is going to go from about 50 to about 91 days over a 100-degree heat index," Porter said.A U.N.