The National Weather Service stated that temperatures in Phoenix hit a new record at 118 degrees Fahrenheit on Sunday.
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The highest temperature recorded on Sunday in the United States was just two degrees warmer in nearby Glendale, Arizona, the NWS said.
Phoenix’s temperature is again forecast to soar to 115-120 degrees, meaning it could rank among its hottest five days on record.
The record heat also impacted some flights over the weekend.
Further northwest in the San Fernando Valley, some thermometers were reading close to 110 degrees, and Palm Springs in the inland desert hit 115.
Two deaths related to extreme heat are being reported by search and rescue crews in southern Arizona.
The temperature reached 96 in downtown Los Angeles.
The National Weather Service says that unsafe heat levels will continue, and that temperatures of 120 degrees will be possible in some places. Prescott, at a mile high, reached 102 degrees, 3 degrees hotter than the previous record for the day and 2 degrees shy of the all-time record.
A 19-year-old woman suffering from heat-related illness died northeast of Tucson. She was transported to a hospital in critical condition.
The agency issued excessive heat warnings for Tucson and Yuma as well as recreation spots such as the Grand Canyon and Lake Havasu.
A strengthening ridge of high pressure lifting out of Mexico was expected to continue scorching portions of Arizona and southeast California on Monday.
In Yuma, Ariz., temperatures reached 119 degrees, while in Flagstaff, at 7,000 feet elevation, a record-breaking temperature of almost 94 degrees broke an 80-year-old daily record set in 1936.
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Larry Subervi reported that a 25-year-old man passed away on Saturday in Phoenix while a 28-year-old female died on Sunday in the same city.
