UPDATE ON 6/25/17 at 9p.m.
After 29 hours since the fire on Chehalem Mountain was first reported, fire crews are preparing to demobilize. Though fire has not been actively burning since late last night, incident commanders wanted to ensure that coals from burned trees and brush did not spread and reignite. Several rotating firefighting crews from TVF&R and ODF have been inspecting the affected area, turning over dirt and debris, cutting down damaged trees and wetting down terrain with heavy fuels.
A TVF&R fire investigator has determined that the most probable cause of the fire was untended slash burn piles, which can smolder and remain hot for several weeks after they've been "extinguished".
UPDATE FROM 6/25/17 at 5p.m.
At 11:15 p.m. on June 24, 2017 multiple callers to 9-1-1 reported heavy flames and smoke coming from a two-story home in the 6000 block of SW 169th Place in Beaverton.
Firefighters arrived to pressurized black smoke coming from the eaves and 20 foot flames coming from roof. They quickly initiated a search and confirmed no one was in the home. Firefighters then established aerial water streams to suppress and contain the fire to the primary home.
Due to these quick actions, the fire damage was limited to the garage and roof and did not spread to another residence. There is no cause or damage estimate at this time.