Temperatures in the Valley are expected to spike as high as 105 degrees by Monday, according to the National Weather Service.
Matt Hirsch, a Weather Service meteorologist, said that's seven to eight degrees above average.
"There's going to be a really strong, high pressure system building across the inter-mountain West," he said.
That system will pull in warm and dry air, forcing temperatures from 99 degrees on Saturday up to 103 on Sunday,
Hirsch said Monday will be the warmest day with temperatures starting to cool on Tuesday and Wednesday.
"It looks like through Friday ... it stays above (normal)," he said.