Downed transmission lines in Vallejo interupted electricity to 4,500 Pacific Gas and Electric customers in Vallejo and Benicia this morning.
The power outage was first reported at around 9:30 according to PG&E spokesman Jason King. The site of the downed lines is near Sandy Point Road and Magazine Street in Vallejo.
King said PG&E is still trying to determine what caused the lines to fail.
King said power had been restored to all but 21 customers at 10:30 a.m.