UPDATED 10:04 A.M.:
PG&E spokesperson Jason King told Patch the cause of the outage that occured around 8:34 a.m. Friday in San Mateo near Highway 92 and U.S. Highway 101 between E. Hillsdale Boulevard and El Camino Real was determined to be a tree that fell on a power line.
King said power is expected to be restored to the 118 affected customers in San Mateo by 1:30 p.m. Friday.
Hundreds of residents lost power in San Mateo on Thursday night, and PG&E crews were still working Friday morning to restore power to at least 100 customers.
The first of two outages came at 6:27 p.m. Thursday, leaving 142 customers without power. PG&E crews estimated their power would be restored by 1 a.m., PG&E spokeswoman Jana Morris said.
The second outage affecting 662 customers started at 8:55 p.m., and PG&E estimated power would be restored to those customers by 2:45 a.m.
At about 8:34 a.m., an outage affecting 118 customers was reported in the areas around state Highway 92 and U.S. Highway 101, between East Hillsdale Boulevard and El Camino Real.
The same area, which includes the Hillsdale Shopping Mall, was the same spot outages were reported Thursday night, said PG&E spokesperson Jason King.
Power lines came down in San Mateo on Thursday night, potentially due to heavy winds, King said, although the cause of the 8:34 a.m. outage was not yet known.
Patch will update this story as more information becomes available.
Bay City News Service contributed to this report.