Las Vegas is sizzling under a prolonged heat wave that has delivered a record-breaking seven consecutive days of temperatures 115 degrees or higher amid a historically hot summer in the United States.

Borrego Springs hit a temperature of 120 degrees on Monday, which broke the all-time record high for this day, according to forecasters. The previous record of 117 for July 8 was set in 1976, less ...

Palm Springs broke its all-time high temperature record Friday afternoon, with the mercury hitting 124 degrees at 3:53 p.m., according to the National Weather Service. The previous high temperature of ...