About 25,000 customers in Berkeley, 19,000 in El Cerrito and 3,500 in Richmond were affected.
IT stared around 7:30 a.m. PG&E officials said power was restored around 11 a.m.
Around 10:15 a.m., BART officials said the downtown Berkeley station was reopened and they are in the process of restoring normal service.
Around 9 a.m., there was a 20-minute delay in both directions on the Richmond line. Passengers were still able to get in and out through the North Berkeley or Ashby stations.
About an hour after that power issue was resolved, another outage hit, this time in San Francisco.
It affected about 2,000 customers. Power was restored about three hours later.
PG&E will only say equipment failure caused both outages, but would not give details.