Six Arizona counties could see the heat index reach 125 degrees at least one day a year in the next 30 years, according to a new report from the nonprofit First Street Foundation.
Mohave, Maricopa, La Paz, Pima, Pinal and Yuma counties will see higher temperatures for longer periods by 2053 due to a changing climate.
Maricopa County could see an average of 100 days with a heat index above 100 degrees, compared to the current average of 83 days.
While Yuma County is expected to have the longest, hottest summer with a projected 71 consecutive days above 100 degrees.
“Extreme danger” heat currently impacts 8 million people per year and that number will likely grow to 107 million people in 2053.