An electric overhead power connector sparked and then blew out shortly after 10 a.m. on Homer Avenue near Middlefield Road in Palo Alto.
Homer, which had been closed between Middlefield Road and Webster Street, re-opened as of noon. Utility crews continue to work to repair the connector.
The connector failure was caused by a tree branch that fell onto an adjacent power line, according to Linda Clerkson of the city's Utilities Department.
The outage affected only two homes and power was expected to be restored by noon.