A brush fire that erupted in dry, windy conditions east of the Cajon Pass in the Silverwood Lake area of San Bernardino County on Saturday afternoon and forced campers and others to flee was stopped at 485 acres and 10% contained as of Sunday.

The fire prompted widespread evacuations and precautionary power outages, with the fire continuing to pose a threat to high-tension power lines, according to Cal Fire and Watch Duty, a nonprofit app that tracks wildfires.

About 30 homes were threatened by the blaze, but as of Sunday, none were reported damaged.

Cal Fire announced by midday that the blaze’s forward progress had been stopped.

Fire crews worked through Saturday night into Sunday to build containment lines and protect communities. The weather was a challenge, with gusty, southerly winds up to 25 mph and low humidity. Conditions were expected to improve overnight, but the winds are forecast to increase again Sunday afternoon, with gusts up to 25 mph, Cal Fire said.

Monday is expected to bring stronger wind gusts exceeding 30 mph, which could challenge firefighters’ efforts.

Evacuation orders were issued by the San Bernardino County Sheriff’s Department for residents living south of Highway 138 from Highway 173 to the 15 Freeway, the sheriff’s department announced.

Also, an evacuation warning was issued for an area south of Hesperia and north of Highways 138 and 173.

Highway 138 was closed from Old Mill Road to the 15 Freeway. Highway 173 was closed at Highway 138 to Summit Valley.

Numerous firefighting air tankers from throughout the state were flying fire suppression missions as conditions allowed, Cal Fire said. The agency also said more than 520 personnel, three helicopters and 54 fire engines have been dispatched to the area near Silverwood Lake, a popular spot in the San Bernardino mountains.

Silverwood Lake State Recreation Area, where park visitors were evacuated Saturday, announced on social media it would be closed Sunday due to the fire. An evaluation will be made to determine if it reopens on Monday.

Authorities announced Sunday that anyone looking to retrieve a vehicle from the Silverwood Lake Recreation Area should drive to the road closure checkpoints at Highway 138 and Highway 173 in Hesperia and be prepared to show identification and follow directions from law enforcement personnel.

The Lake fire burned southwest of Silverwood Lake on Saturday evening, Cal Fire San Bernardino spokesperson Alison Hesterly said. Winds were pushing the blaze to the northwest, and it was burning in heavy brush, Cal Fire said.

No injuries have been reported due to the fire, which started around 4 p.m. on Saturday.

It wasn’t immediately known what caused the fire. The San Bernardino National Forest, the San Bernardino County Fire Department and Cal Fire San Bernardino were working together in the effort to contain it.