By 
A pedestrian uses an umbrella to get some relief from the sun as she walks past a sign displaying the temperature on June 20, 2017 in Phoenix, Arizona.
Ralph Freso | Getty Images
Heat records are falling around the world this summer, and scientists expect that climate change will make the problem worse in coming years.
Next year, about 50 U.S. counties, which are home to more than 8 million residents, are expected to experience heat index temperatures above 125 degrees Fahrenheit according to a new model released on Monday by First Street Foundation, a nonprofit research and technology group working to assess climate risk.
That puts those counties at the highest level of the National Weather…
Source cnbc.com
