A campfire that escaped control in the Shasta-Trinity National Forest is being blamed for starting the Root Fire that erupted on Labor Day and ballooned to 759 acres west of Castella, prompting evacuations in the area.
Flames jumped beyond the campfire's perimeter near Castle Creek Road, about 3 miles west of Interstate 5 at Castella. The fire was reported at 12:36 on Sept. 1 and quickly spread through dry grass and trees, the U.S. Forest Service said.
Forest service officials did not release any other information about the incident, which occurred just over two weeks after they activated fire restrictions at Shasta-Trinity due to the hot and dry conditions of the season.
Crews attacked the fire from the air and made strong gains. As of Thursday, firefighters had built containment lines around 45% of the fire, up from zero on Wednesday morning.
Firefighters expressed hope that several days of cooler weather — in the forecast starting Thursday — will help calm Root and other fires, and stop them from spreading through extremely dry forestland.
The forest service cautioned people living in and visiting the area to “stay away from areas where firefighters are conducting operations, and to do their part in preventing new fires.” That includes making sure chains and other metal items aren’t dragging on the road, tires are properly inflated, properly snuffing out campfires and never leaving a campfire unattended, the announcement said.
Roads closed and evacuations due to the Root Fire
Roads closed Thursday due to Root Fire activity include Castle Creek Road/Forest Service 25 Road at Castle Crag State Park, and Forest Service 25 Road at the intersection of the Forest Service 26 Road, according to the forest service. For updates on road closures from Caltrans go to dot.ca.gov/travel.
The Shasta County Sheriff's Office issued an evacuation order for people near the fire, and warnings for those in areas to the north. To find your zone, type your address at protect.genasys.com/search. If you're away from home and not sure of your address, users can find their location on the site's map.
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Causes of other North State fires burning Thursday
Crews battled other North State wildfires on Thursday, the forest service said; most ignited by lightning from thunderstorms during the last week of August.
Fires burning in Shasta County
Crews built containment up to 80% on the 40.5-acre 5-4 Fire burning near Trinity Mountain Road, north of French Gulch and roughly 20 miles west of Redding. The forest service is investigating the cause of this fire, which started on Aug. 27.
Also in the Shasta-Trinity Forest, the 538-acre Swift Complex is burning just west of Trinity Lake. It includes the 506-acre Peak Fire (15% contained), the 36-acre Lick Fire (40% contained) and the uncontained 103-acre Cedar Fire. Lightning ignited the Peak and Lick fires last week (on Aug. 25 and 29), but the Cedar Fire was caused by human(s) on Wednesday, the forest service said.
The cause of the uncontained 18-acre Tracy Fire is under investigation. It started on Sept. 1 near Rancho Estates Road and Tracy Ann Lane, west of Cottonwood, according to the California Department of Forestry and Fire Protection.
Fires burning in Siskiyou County
The uncontained Blue Fire scorched 2,452 acres 9 miles east of Happy Camp in the Klamath National Forest. The forest service reported lightning caused the Blue Fire before 8:15 p.m. on Aug. 26. Evacuation orders and warnings are in place for communities near the fire. For a list of zones go to fire.ca.gov/incidents/2025/8/26/blue-fire/.
Also burning in the Klamath, the uncontained 971-acre Log Fire is burning at Salt Log Creek, northwest of Sawyers Bar. The forest service reported its still investigating the fire's cause.
In the Six Rivers National Forest, the 9,761-acre Dillon Fire is 21% contained. The California Department of Forestry and Fire Protection reported intermittent road closures on Highway 96 near Seiad Valley. Started on Aug. 25, the cause is under investigation.
The forest service reported more than a dozen small fires burning this week, most less than an acre. Some were caused by lightning, but investigators are still investigating some of those fire starts.
Where wildfire smoke is making Shasta/Siskiyou air unhealthy
After spiking earlier in the week, pollution levels on Thursday dropped to moderate and low levels in most areas from Hornbrook and Yreka in the north the Redding area in the south, according to EPA's AirNow air quality reports.
Sommes Bar on Highway 96 in southwest Siskiyou County had the worst air in both counties on Thursday morning, according to the EPA. Pollution reached levels the EPA said are unhealthy for children, the elderly and people with some health conditions.
Jessica Skropanic is a features reporter for the Record Searchlight/USA Today Network. She covers science, arts, social issues and news stories. Follow her on Twitter @RS_JSkropanic and on Facebook. Join Jessica on Record Searchlight Facebook groups Get Out! Nor Cal , Today in Shasta County and Shaping Redding’s Future. To support and sustain this work, please subscribe today. Thank you.