San Diego Gas & Electric announced Friday 4:30 a.m that have had power restored for all 1.4 million customers, after 13 hours from massive outage struck.
San Diego Gas & Electric vice president, Dave Geier said 100 substations are back on line.
“The 100% return occurred about an hour before the news conference announcement,” Dave Geier said.
Dave Geier said that despite the return of power, customers should try to use electricity sparingly, lest they overload the system.
“The system is still fragile,” he said.
The SDG&E vice president also told reporters that it appears that a worker for the Arizona power agency caused the outage but it is unclear what he did.
“We’re not sure,” Geier said.
According to officials, the worker’s action apparently caused the San Onofre nuclear power plant to go offline, along with a “cascading” impact on other sources.
“It tripped out immediately,” Dave Geier said.
And he added that the outage was unprecedented:
“We’ve never have this happen before, and we see no reason it will happen again.”
An investigation involving multiple agency is being launched to determine the cause of the outage, which struck the entire SDG&E service area in San Diego County, southern Orange County and parts of Riverside County and also hit were Baja California and the Imperial Valley.
The latter is served by the Imperial Irrigation District which reports that 100% of customers are receiving power.