The blaze had burned about 3 square miles at the Colockum Pass area and forced the evacuation of more than 40 homes and cabins.
Two helicopters and an airplane dropped water and fire retardant on the Wenatchee blaze. About 100 firefighters from Chelan and Douglas counties as well as the Washington Department of Natural Resources are working on the fire.
Officials said late Saturday night that two firefighters suffered minor injuries, but did not elaborate.
They also said that in addition to the two structures already destroyed, the blaze showed significant activity Saturday evening other structures might have been lost, but crews still haven't confirmed that.
High temperatures and 30 mph winds are making the effort to fight this fire and protecting homes and cabins in the area more difficult, said Chelan County Fire Chief Bill Neckels.
Meanwhile, A wildfire burning near Goldendale has grown to nearly 27 square miles.
Spokeswoman Lauren Durocher of the interagency fire management team says the fire has grown in part from Saturday's estimate of 14 square miles because of more accurate mapping.
The fire along the top of Satus Pass is threatening about 144 structures, including about 69 residences. That number was also updated on Sunday. No structures have been destroyed but all have been evacuated.
The fire was about 15 percent contained on Sunday and about 1,100 people are working on the blaze.
Most of Highway 97 between Goldendale and Toppenish remains closed
The National Weather Service has issued a red flag warning for the fire danger in much of Eastern Washington, including Goldendale, Tri-Cities, Yakima, Walla Walla, Wenatchee and Moses Lake.