"It's mostly smoke," Cannon said. "We were just concerned because it is close to the White Hills subdivision in Cedar Fort."

• A Summit County fire ignited Saturday afternoon up Echo Canyon on I-80, about 20 miles from the Wyoming border, sheriff's dispatchers said.

The area is a second-home community called Echo Creek Estates, said Dale Jablonski, northeast area manager of the Division of Forestry, Fire and State Lands.

The human-caused fire blackened about 200 acres, and while structures were not immediately threatened Saturday evening, "there's a possibility," Darboven said.

"It's in a really tight canyon, so the winds, in combination with the high temperatures, is making firefighting very difficult," she said. The fire was expected to be 50 percent contained by the end of the evening, Jablonski said.

• Flames ripped through 1,500 acres of grass and juniper trees on federal lands just off I-80's Dugway exit in Tooele County by Saturday evening, Darboven said.

No structures were threatened by the "Timpie Fire," which was about 15 percent contained by late Saturday afternoon, she said. Crews Saturday evening attacked the blaze from the air and ground, assisted by three engines, one helicopter, two single-engine air tankers and one heavy air tanker.

"The challenge we're having ... is high winds, steep terrain and poor access," Darboven said.

The blaze was most likely caused by people target shooting, she said, and "quickly got away due to winds and vegetation."

A dry cold front was to move through the state Sunday, bringing weakening winds and more normal temperatures in mid-80s range to northern Utah, said Mike Conger, National Weather Service forecaster. Southern Utah is expected to remain hot and dry.

Gilbert held out hope that cooler weather would give fire crews a hand.

"Hopefully tonight when the cold front starts coming in ... the fire will turn on itself and shut down," he said of the Cedar Fort blaze. "Until that happens, there's still the possibility it could be days."

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Contributing: Ben Winslow

E-mail: estuart@desnews.com; jtcook@desnews.com