"Everybody's been saying how hot it is, the last two days," said CNN meteorologist Indra Petersons. "This is nothing compared to what they're expecting this weekend."
Temperatures in Arizona and California deserts are forecast to rise as high as 122 degrees in California's Coachella Valley and as high as 118 in the city of Phoenix, CNN said.
Friday the temperature reached 106 in Phoenix, 105 in Tucson, 110 in Las Vegas and 96 in Denver, the Weather Channel reported.
The heat wave will bring record high temperatures to areas from northern California to Texas next week, and the risk of wildfires resulting in a fireworks ban on Independence Day in some communities, Accuweather.com reported.