More than 100 million Americans in this region will experience temperatures above 125 degrees (52 degrees Celsius) during their hottest stretches of the year, more than 10 times the number expected currently.Using a peer-reviewed extreme heat model, First Street Foundation used property-level data to find the hottest seven days of the year currently and compared that to the equivalent in 30 years.
Florida's Miami-Dade County will see the largest shift in extreme temperatures, where the hottest seven days of the year in 2023 (heat index of 103 degrees) will occur on 34 days in 2053.