BERKELEY -- More than 19,000 customers lost power in Berkeley on Monday night and several smaller outages were reported in cities throughout the East Bay, although the cause of the outages wasn't immediately clear.
The outage in Berkeley occurred about 9:30 p.m. About 12,000 homes were originally reported without power, but PG&E revised that to 19,000 customers by about 11 p.m. Several crews were responding to try to determine the cause and restore power, PG&E reported.
As many as nine smaller outages were also reported beginning about 9 p.m., including outages in Fremont, Hayward, Concord, Martinez, Oakland, Oakley and Pinole.
Although the nine outages were reported in various cities, PG&E officials could not connect them and their cause was unknown late Monday evening.
"We have a crew responding to a substation in Berkeley and once they arrive they will be able to figure out what caused the outage," spokeswoman Jana Morris said.
An estimated time of restoration for all customers was unknown, Morris said.
Earlier Monday, fire crews responded a grass fire near Interstate 680 in Martinez, with unconfirmed scanner traffic indicating the cause may be a downed power line. The blaze broke out about 9 p.m. at 2001 Waterfront Road near the freeway, a fire dispatcher said.
"At this point it doesn't appear to be related," Morris said. "There are two substations in those areas and those outages took place about 35 minutes apart."
Contact Natalie Neysa Alund at 510-293-2469. Follow her at Twitter.com/nataliealund.