SAMS VALLEY, Ore. (Oct. 17, 2026) — Firefighters have completed construction of firelines around the entire 281-acre West Fork Evans Creek Fire, increasing containment to 25% as of Saturday evening, Oct. 17, according to the Oregon Department of Forestry.
The milestone marks significant progress in suppression efforts as crews continue working to secure the fire’s perimeter and extinguish remaining hot spots.
Fire officials reported that cooler temperatures, lighter winds and reduced fire activity throughout Saturday provided favorable conditions for firefighters. Crews successfully established firelines around 100% of the fire’s perimeter, allowing them to shift their focus toward strengthening containment and conducting more extensive mop-up operations.
A persistent temperature inversion also contributed to reduced fire behavior throughout much of the day. The inversion, which extended into the afternoon, trapped cooler air beneath a layer of warmer air, limiting vertical air movement and atmospheric mixing.
According to fire officials, those conditions reduced the upward movement of heated air and smoke, helping prevent stronger convection and more active fire behavior.
With fireline construction complete, firefighters concentrated on securing the perimeter by conducting mop-up operations approximately 15 to 25 feet into the burned area.
Crews are expected to continue working overnight to expand those operations to approximately 40 feet where terrain and safety conditions permit. The work involves locating and extinguishing remaining areas of heat that could threaten established containment lines.
Despite the progress, heavy concentrations of vegetation and other combustible materials continue to support burning within the fire’s interior.
Fire officials cautioned that smoke and visible flames may still be observed within the burned area. However, firefighters have successfully kept the fire within its established perimeter.
The primary objective remains preventing additional spread while progressively increasing containment through continued mop-up operations.
A substantial firefighting force remains assigned to the incident, including nine 20-person hand crews, one eight-person hand crew, 10 Type 6 fire engines, seven water tenders and three bulldozers.
The operation is also supported by two task force leaders, four heavy equipment bosses and additional incident management personnel.
These resources will continue working throughout Saturday night to reinforce containment lines and address remaining areas of heat.
The Oregon Department of Forestry continues coordinating suppression efforts with the U.S. Wildland Fire Service.
No structures have been destroyed by the fire, and officials reported that no structures are currently threatened.
The cause of the West Fork Evans Creek Fire remains under investigation. Fire officials said the cause is not immediately apparent, and investigators are conducting a thorough examination to determine how the fire started.
With the fire now fully lined and containment increasing, suppression efforts will continue focusing on securing the perimeter and preventing any additional spread.
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