Orange County firefighters were battling a 3rd alarm blaze at a single-story commercial building in Santa Ana, with a portion of Harbor Boulevard shut down during the firefight, authorities said.
Firefighters were called to the 2700 block of South Harbor Boulevard just past 5 a.m. and saw fire burning through the roof of the building, OCFA spokesman Capt. Greg Barta said.
Harbor Boulevard was closed from Segerstrom Avenue to Warner Avenue, the spokesman said.
Firefighters were in a defensive mode battling the fire, staging outside the building and using ladders to pour water down onto the roof for firefighter safety and to protect nearby buildings, Barta said.
The fire was still active as of 7:30 a.m.
The building houses multiple businesses and the fire started in one of the suites, Barta said, though firefighters do not yet know which one.
No injuries were reported and no one was inside the building when the fire broke out, Barta said.
The cause of the fire is not yet known.
