Three fastest-warming cities in the U.S. are in the Mountain West
Since 1970, summer temperatures in Reno, Nevada, have risen 10.9 degrees, making it the nation’s fastest-warming city, according to Climate Central, a nonprofit research group.
Ranked second is Las Vegas, Nevada, which has seen an increase of 5.8 degrees. Boise, Idaho, follows in third at 5.6 degrees.