The Jim fire burning in the Holy Jim area north of Silverado and Trabuco canyons grew slightly overnight, to 553 acres, authorities said Thursday morning, March 3.

The fire, which was reported about 11:20 a.m. Wednesday, was about 15% contained by 7:45 a.m., authorities said.

Burning in the Cleveland National Forest, no structures have been threatened.

Firefighters planned to continue to constructing hand and dozer lines around the fire perimeter.

The fire, which ignited before noon Wednesday at the bottom of a canyon, started burning its way up the slope toward Santiago Peak near the border of Orange and Riverside counties, U.S. Forest Service spokesman Nathan Judy said.

The HPWREN project at the University of California, San Diego and the National Science Foundation created a time-lapse video that shows the first six hours of the fire’s progress using images from four cameras on Santiago Peak.

Wet conditions from previous snowfall helped prevent the fire from getting out of control, Judy said. Also, the fire was moving toward the burn scar of the 2018 Holy Fire, which also slowed its progression.

Nearly 250 fire personnel  from the Forest Service, the Orange County Fire Authority and Riverside County were combatting the wildfire. The fire’s cause was under investigation.

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