The fire at 6903 Commerce Blvd. was reported at 4:36 p.m., was at least a second-alarm fire, and took more than an hour to control, according to a public safety dispatcher.
Lt. Jeff Taylor said that cause of the fire remained under investigation.
One firefighter was treated for heat exposure and was later released, Taylor said. No other injuries were reported.
The American Red Cross is providing assistance to the affected families.