Meanwhile, parts of southern Utah including St. George, Kanab, Escalante, Bullfrog, Utah's Dixie and Zion national parks and the Glen Canyon Recreation Area, including Lake Powell remained under a heat advisory through 9 p.m. Wednesday.
The weather service said temperatures between 110 and 115 degrees were expected in the St. George area through Wednesday. Outside the city, temperatures were expected to peak at 110.
People will be more prone to heat-related illnesses during the heat-advisory period. The weather service asked people to take precautions when spending time outside, such as wearing lightweight and loose-fitting clothes and drinking plenty of water.
In Salt Lake City, temperatures were expected to top out at 102. Those 100-plus degree days will continue until July 4, when temperatures will fall to a refreshing 96.
Added to the temperature woes were concerns about air conditions.
Utahns were under a yellow air-quality day through Monday, which means unusually sensitive people should reduce outdoor exertion, and residents ought to reduce driving and consider using mass transit.
Salt Lake City's high temperature was pegged at 102 for both Sunday and Monday; Ogden looked for 102 on Sunday and 103 on Monday; Provo 102 and 103, respectively; Logan 99 and 100; Wendover 101 and 102; Duchesne 93 and 92; Cedar City 97 both days; St. George 112 both days; and Moab 103 and 102 degrees.