BELLINGHAM, WA (MyBellinghamNow.com) – A fast-moving wildfire has forced evacuations in Okanogan County.

The state Fire Marshal issued level 3 “Go Now!” and level 2 “Get Set” evacuations for parts of Winthrop.

Fire crews responded to reports of flames on Stud Mountain around 3 p.m. on July 31.

The fire has burned about 550 acres of grass, brush, and timber and is threatening to spread to nearby buildings.

As of the morning of August 1, it is 5% contained.

The cause of the wildfire remains under investigation.