Wildfire Update

Thielsen Fire update for Sept. 18, 2020, 1:30 p.m.

Update for Sept. 18, 2020, 1:30 p.m.
Incident Commander: Southern Area Incident Management Gold Team
Fire Information Line: 541-595-8227
Acres: 9,995
Containment: 15%
Location: Diamond Lake Ranger District, Umpqua National Forest, about 5 miles north of Crater Lake National Park and within 1 mile of Diamond Lake Resort.
Cause: Unknown
Evacuations: Level 3 “GO” evacuations are in place for the Diamond Lake, Lemolo Lake and Toketee Ranger Station areas. Visit the Douglas County Sheriff’s website for the most current information.


5 miles north of Crater Lake National Park and within 1 mile of Diamond Lake Resort


Total Personnel: 329          Helicopter: 1           Type 3 Engines: 4          Type 4 Engines: 5

Type 6 Engines: 7                Dozers: 6                  Water Tenders: 5          Masticators: 1

Current Situation

Today, firefighters will focus on direct attack where possible, as well as protecting critical infrastructure and securing and holding the fire’s southern edge near the northern boundary of Diamond Lake. They will also secure and mop up along containment lines. Crews will secure the Cinnamon Butte communications tower and improve structure defense around the tower. Air operations will drop retardant to protect the Cinnamon Butte Lookout as weather conditions allow. Firefighters will use heavy equipment to create lines around the fire and will conduct firing operations when fire behavior and weather permits.


Road Closures: Highway 138E is closed. For the latest road conditions, visit www.tripcheck.com.

Forest Closures: Temporary emergency closure orders are in effect for all National Forest System lands, roads, and trails within the Cottage Grove Ranger District: ORDER NO. 06-15-01-20-423, Tiller Ranger District ORDER NO. 06-15-02-20-422, Diamond Lake Ranger District ORDER NO. 06-15-03-20-420 and North Umpqua Ranger District ORDER NO. 06-15-06-20-421.

Flight restrictions: temporary flight restriction is in place from the surface up to and including 10,000 feet to provide a safe environment for fire-fighting aviation operations.

Air Quality

Areas around the Thielsen Fire should start to see clearing this morning. For more information visit http://oregonsmoke.blogspot.com/

Weather and Fire Behavior

Temperatures will be lower today with higher humidity. Forecasted precipitation should stall fire behavior. Thunderstorm development could produce outflow gusts of 50 mph. Over the next couple of days, warmer and drier conditions will gradually return, potentially causing increased fire behavior.