UPDATE: As of 4 p.m., the outage that affected more than 50,000 PG&E customers in Marin, Sonoma and Monterey counties was in the process of being resolved, a utility spokesman said. Power has been to restored to large parts of San Rafael and Ross Valley, though intermittent outages are still occurring.
At about 1:30 p.m., an outage was reported in PG&E's power transmission system, interrupting service to about 165,000 customers throughout the North Bay counties and in cities on the Central Coast, including Carmel, Marina and Monterey, PG&E spokesman J.D. Guidi said.
Utility crews had not yet determined the cause of the outage, Guidi said.
Power was being systematically restored throughout the outage area and as of 4:00 p.m., more than two-thirds of the affected customers had been restored.
UPDATE: Power is back on in most of Northern San Rafael -- Marinwood and Terra Linda. However, it is still reported out in much of Marin. In addition, there are reports of outages throughout the Bay Area, including Vallejo and as far away as American Canyon.
PG&E has said it will have an update by 4:45 p.m.
A massive power outage has left approximately 5,000 residents without throughout central Marin. Police reports estimate that power is out in all of San Anselmo, Fairfax, Ross, San Rafael, parts of Larkspur and Corte Madera and parts of unincorporated Marin County.
Police in Novato and Mill Valley said they had not yet received any calls of outages, but San Anselmo police officers said outages have been reported as far away as Cotati and Monterey County.
PG&E representatives didn't have an estimate on when power would be restored and are currently attempting to determine the extent and cause of the outage. Power in some areas of San Rafael has already been restored.
Residents are advised to use extreme caution as many traffic lights have been affected, including along Sir Francis Drake Boulevard and around the Civic Center.
-- Bay City News contributed to this report.