Fire crews in San Bernardino County are actively battling the rapidly spreading Rex Fire near Glen Helen Parkway and Cajon Boulevard in the Devore area of Southern California. The vegetation fire triggered a major emergency response Friday afternoon as firefighters worked to slow the blaze before it could threaten nearby communities, traffic corridors, and structures.
According to initial reports, the fire was first reported at approximately 2:32 p.m. on May 22, 2026. Authorities stated that the blaze began in a wash area and quickly spread through heavy vegetation fuels, creating active fire behavior visible across portions of the region. Smoke from the incident could reportedly be seen from several surrounding areas as crews rushed to establish containment lines.
Firefighters from multiple agencies, including Cal Fire San Bernardino Unit and local fire resources, responded aggressively both on the ground and from the air. Helicopters and other aerial firefighting resources were observed making water drops over the affected area while engine crews and hand crews worked to prevent the fire from advancing further. Officials indicated that the fire had reached approximately five acres during the early stages of the incident, though conditions remained dynamic as crews continued suppression efforts.
Authorities also confirmed that an urban camper population located near the fire zone was being evacuated as a precaution while firefighters focused on protecting nearby areas. Emergency responders emphasized that public safety remains the top priority as weather conditions, dry vegetation, and wind patterns continue to pose challenges for containment efforts.
Traffic conditions throughout the Cajon Pass corridor became heavily congested as emergency vehicles responded to the area. Northbound Interstate 15 experienced significant delays due to a combination of firefighting operations, regular Friday traffic, and increased Memorial Day weekend travel activity. Officials urged motorists to avoid the area whenever possible and remain alert for emergency personnel operating near roadways.
At this time, no injuries or structural losses have been officially confirmed, and the cause of the Rex Fire remains under investigation. Fire officials are expected to provide additional updates regarding containment progress, evacuation advisories, and potential impacts as crews continue working through the evening.
The incident highlights the continuing wildfire danger across Southern California as dry conditions and