An unplanned power outage in the mountain community of Julian forced schools in the area to close Wednesday.
The outage began at about noon Tuesday and lasted nearly a day before power was restored to the about 1,100 San Diego Gas & Electric customers affected in the Borrego Springs, Julian, Santa Ysabel, Pine Hills areas.
The unexpected outage forced the Julian Union High and the Julian Union school districts to cancel classes Wednesday.
SDG&E said their automatic safety features kicked in and de-energized the line. Power was restored at about 10:30 a.m. but SDG&E had not yet released a cause.
Crews worked throughout the morning to figure out what caused the safety shut-off. At one point, the utility sent a helicopter to inspect parts of the line that are not accessible on foot.
The San Diego County Office of Education (SDCOE) initially said the closure was due to a planned power shut-off by SDG&E to prevent fires amid Santa Ana winds. The forced outages have the potential to affect nearly 24,000 customers in the mountain communities. SDCOE later clarified that the outage was unplanned.