SAN DIEGO - An Arizona power company said Thursday that a worker probably caused the power outage that left large parts of Southern California and the surrounding region in the dark.
APS, which is Arizona's largest electric utility, said a power line was tripped near Yuma, Ariz., at 3:30 p.m. Thursday during maintenance work.
San Diego Gas & Electric said it is attempting to begin restoring power in some areas. But they said the outage might last into Friday evening in some areas.
More than 1.4 million people in a large swath of Southern California and beyond were affected as a blackout brought normal life to a halt.