A fire aided by dry grass and high winds led to voluntary evacuations for a part of the town of White Swan in the Yakama Indian Reservation.
A house fire east of town destroyed at least five homes on Saturday as firefighters fought to contain the blaze, KIMA-TV reports.
No injuries were reported.
Yakama Nation log decks are also on fire.
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The town's ceremonial long house and high school are serving as evacuation shelters.
Fire districts in the upper and lower Yakima Valley have responded to the fire, which was about 25 percent contained late Saturday afternoon.
Sgt. George Town of the Yakima County Sheriff's Office says high winds are pushing the fire closer to town, but did not know whether mandatory evacuations would be called for