Crews from multiple fire departments knocked down a four-alarm blaze that erupted early Wednesday outside at a Santa Ana warehouse belonging to the La Rosa Company, located at the 2100 block of South Anne Street.  Emergency personnel responded to the fire at about 1:15 a.m. after multiple callers reported the fire, which threatened at least four buildings, according to the KTLA.

The warehouse contained metal containers with corrosive materials, said Orange County Fire Authority spokesman Steve Concialdi. The structure did not burn, but chemicals stored outside the warehouse burned under an awning, fire officials said, according to NBC.

The company makes nail polish, nail polish remover and acrylic nails. Its products include chemicals such as acetone, alcohol and glycerin, among others. Investigators say the fire started outside in some pallet, in an area that had more than 30 55-gallon drums of chemicals and several 1-gallon containers as well,  and then spread to the building, accordin to CBS.

“A knockdown was declared at 7:12 a.m., but we still have multiple hotspots and firefighters on scene,” said Capt. Steve Concialdi, an Orange County Fire Authority spokesman, more than an hour later. “I expect they (firefighters) will remain on scene for quite a while.”

At its height, Concialdi said, around 100 firefighters battled the blaze, working to keep the flames from making their way into adjacent structures. No injuries were reported and no evacuations were ordered, according to the Fountain Valley Patch.

Fire prevention officials with the OCFA have also responded to the fire, and will be looking into whether the drums of chemicals were being properly stored, Concialdi said, according to the O.C. Register.