Authorities responded to the "major emergency fire" at a recycling plant at Slauson and Central avenues at about 11 a.m. The fire was reportedly sparked when propane tanks exploded.
There was originally a report of a firefighter missing, but authorities have confirmed that the firefighter is OK. One civilian was transported to a local hospital for unknown injuries.
Firefighters worked from every angle to try to wet the buildings down around the fire. They used foam, as well as water, to put out the flames.
The LAPD Central Bureau was placed on tactical alert, which means no one could go off duty. Officers were seen in riot gear going to businesses in the area to advise them to stay sheltered, and LAUSD schools in the area were told to keep shelter.
The Coast Guard was notified about runoff possibly getting into the flood control channel.
The cause of the fire remains under investigation.