SALT LAKE CITY -- A wildfire on the Utah-Idaho border has grown to more than 25 square miles
Jennifer Hansen with the Northern Utah Interagency Fire said late Sunday that State Fire near Portage had pushed significantly to the north and was about a mile south of the Idaho community of Samaria.
Hansen says the threat to the town is minimal and no evacuations are in place.
Two Utah National Guard Blackhawk helicopters are assisting fire crews with the lightning-caused blaze.
Gov. Gary Herbert authorized Guard members to assist firefighting efforts Sunday as fires elsewhere in the state diverted resources.
The fire was 38 percent contained Sunday morning but Hansen said officials have not estimated containment since then.
Hansen says the fire is not expected to grow much overnight.
The lightning-caused fire broke out Thursday evening and is burning mostly on private property in Pocatello Valley, Box Elder County and some Bureau of Land Management property in North Canyon, Idaho.
Hansen said Sunday the fire is about 38 percent contained and there are a handful of cabins west of the town which are about a mile from the fire, but there's minimal threat to those structures.
Conditions Sunday afternoon were slightly windy, with winds of 10 to 15 mph from the south with gusts more than 20 mph, Hansen said, but officials expect their fire lines will hold.
The governor's office said in a statement that extra air support from the Guard members was requested to help battle flames in steep canyons because fires in other parts of the state have diverted scare air resources.
Utah National Guard members are also assisting firefighting efforts with the Millville Fire in Cache County, which as burned 250 acres south of Logan.
Logan City fire marshal Craig Humphreys said the fire was reported around 4 a.m. Sunday between Millville Canyon and Blacksmith Fork Canyon.
Humphreys said lightning caused four separate fires in the area, two of which burned into each other.
Crews were working to protect a barn that stores hay, but no other structures were threatened, he said.
At least 50 firefighters were battling the Millville and State fires on Sunday, the newspaper reported.
Elsewhere in the state, smaller fires were burning Sunday but were not threatening structures.
The 60-acre Patch Springs Fire was burning roughly 30 miles west of Tooele. Fire officials were also monitoring the six-acre Mount Elmer Fire, which broke out in the Mount Naomi Wilderness on Friday, but crews were not staffing the fire because they were battling higher-priority blazes elsewhere.