PINON HILLS, Calif. (VVNG.com) — Highway 138 was closed in both directions Thursday afternoon as firefighters battled the Acorn Fire in Pinon Hills.
The incident was reported on May 7, 2026, at about 3:05 p.m., near Highway 138 and Acorn Road in Pinon Hills.
According to Cal Fire, the vegetation fire had grown to approximately 9.5 acres and was threatening nearby structures as of a 3:46 p.m. update posted on X.
Firefighters from San Bernardino County Fire and Cal Fire responded to the scene as crews worked to contain the blaze.
Air support was assigned to assist with firefighting operations, while additional air and ground resources were ordered. According to radio traffic, most aircraft were later released from the incident, with Air Attack and one helicopter remaining on scene.
No injuries or damaged structures were immediately reported.
Incident Command requested a full closure of Highway 138 between Desert View Road and Evergreen Road due to fire activity and emergency crews working in the area.
Motorists were advised to avoid the area and use alternate routes while emergency personnel remained on scene.
Additional information will be updated as it becomes available.
Update: Firefighters stopped the forward progress of the Acorn Fire after crews worked hose lines around the vegetation fire, according to Incident Command. All aircraft assigned to the incident were later released, per radio traffic.
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