On Saturday, the Chelan County Sheriff downgraded most of the approximately 1,500 evacuation orders, reports Xinhua news agency.
Some homes and structures remain at risk, according to a report by The Seattle Times.
About 300 people are fighting the fire, and a national incident management team arrived on Friday to assist.
Investigators from the Chelan County Sheriff’s Office said the fire was human-caused.
Last week, they had identified the house where they believed the fire began.