Flames and thick smoke were seen shooting out of the roof and windows of the warehouse shortly after 5 a.m.
The nearby freeway was shut down as fire crews poured streams of water onto the flames, which appeared to engulf almost all of the massive structure.
Amazon trucks near the building were also set ablaze. A spokesman for the e-commerce company refuted initial reports that the building was owned by Amazon.
No additional information was immediately released. It is unclear if any injuries were reported.
The cause of the fire remains under investigation.
The Associated Press contributed to this report