Crews are responding to a massive flooding incident on Melrose Avenue on Friday, the Los Angeles Fire Department said.
Service may be off at businesses and residences on Melrose Avenue from Spaulding Avenue to Gardner Street for eight to 10 hours, fire department information officer Erik Scott said.
The Los Angeles Department of Water and Power had originally estimated service would be restored around 1 a.m., but as of 9:30 p.m. the agency said repairs would not be complete until morning.
All lanes of Melrose Avenue, both east- and westbound, will be closed between North Curson Avenue and North Gardner Street until the repairs are made.
LADWP said it was working to repair a six-inch cast-iron main but the cause of the burst is still under investigation.
Water had reached about 1 inch high inside at least two commercial buildings with concrete floors, but only one business suffered minor water damage, according to Scott.
The leak was reported at 4:36 p.m. at 7517 Melrose Ave., in the Fairfax district of Los Angeles. Shortly after 6 p.m., LADWP had arrived on scene and assisted firefighters in shutting off water for the area.