The fire started in the Rockport Estates area off State Road 32 between Park City and Wanship and spread to nearby Three Mile Canyon.
It was like deja vu - because this same area was affected by a huge fire nearly a year ago in August 2013. Officials say this one started as a structure fire in a yurt.
It quickly grew to engulf 120 acres, threatening some homes in the private Promontory development. About 200 residents were told to evacuate and most complied, although a few did stay behind to bunker in place.
Southbound State Road 32 was closed at the Wanship Dam, causing some major delays. We got a tour of a scorched ridge just above the Three Mile Canyon landfill. The Park City, North Summit and South Summit fire departments combined their efforts, using a helicopter, and three-fixed wing aircraft to drop water and retardant on the blaze. It's now 45 percent contained but the battle continues.
"Right now they've been putting in dozer lines around the fire. They've got helicopters and air tankers in. That helps slow down the progress of the fire and then we've got our ground crews on the ground, physically putting out the fire," said Tyler Rowson, State Fire Public Information Officer.
Rowson say they hope to lift the evacuation order by midnight so the residents can get back in and sleep in their own beds Friday night.