Update, 3:35 p.m: The lights are back on in Berkeley after an early afternoon power outage that affected about 35,000 customers.
PG&E spokesman Denny Boyles says the outage occurred at 1:46 p.m. after an equipment failure at a substation in Berkeley. The exact nature of the failure is still under investigation.
Boyles says power was restored throughout the outage area by 3 p.m. At the peak of the disruption, BART's Downtown Berkeley Station was closed and traffic signals were out at many intersections.
Boyles also says that the apparent scope of the outage was not as great as indicated on PG&E's online outage map, which had indicated lights were out as far north as San Pablo.
Update, 3:10 p.m.: The Downtown Berkeley BART Station has reopened, but lights are still out from the north edge of Oakland up to San Pablo.