About 9,500 PG&E customers were without power in the South Bay Tuesday evening in a series of outages caused mainly by the increased use of air conditioners in the summer heat, a PG&E spokeswoman said.
About 1,400 customers had their power restored as of about 5:15 p.m., PG&E officials said.
The latest outage was reported at 4:45 p.m. affecting about 5,400 people in San Jose, PG&E spokesman Nicole Liebelt said.
That added to the 4,100 people without power elsewhere in San Jose and Campbell Tuesday afternoon, Liebelt said.
PG&E believes most of the outages can be traced to air conditioning units being turned up as residents try to stay cool, Liebelt said.
"We're in a heat wave," Liebelt said.
Outages like the latest one are to be expected when people get home from work between 4 p.m. and 6 p.m. and turn on their air conditioners, Liebelt said.
The National Weather Service, which reported a temperature of 91 degrees in San Jose at 4 p.m., today extended an excessive heat warning for the San Francisco Bay Area through Thursday.
The weather service warned of "dangerously hot" temperatures in the 90s to 110 degrees in inland areas through the period.
PG&E is "back feeding" or rerouting power to all customers who are experiencing outages late this afternoon, Liebelt said.
Watchdogs are questioning an exclusive agreement between the City of Oakland and a non-profit group, tapped to lead a multi-million dollar project to redevelop the area around the Coliseum BART station.