Almost the entire region has been smoldering in triple-digit temperatures, and many cities have gone well north of 110. It's even hot at night. On Monday, Las Vegas only fell to 88 degrees during the night.
Tucson hit 116 on Tuesday, making for a record average high of 101.5 degrees for the day. The appropriately-named Thermal, California had a record-setting average daily temperature of 107.5 degrees.
On Tuesday, Las Vegas tied an all-time record high of 117; Needles, California tied a record of 125 degrees; and Ocotillo Wells, California set a record of 124, according to the Washington Post. Meanwhile, Phoenix, Tucson, Yuma, and Palm Springs set record highs for June 20 at 119, 116, 120, and 122, respectively.