SOUTH HOUSTON, Texas – A massive warehouse fire knocked out electricity to nearly 2,000 customers in South Houston overnight.

As of 12:50 p.m., CenterPoint Energy reports that all electrical service disrupted by the fire has been restored.

The fire broke out at about 11:25 p.m. Wednesday in the 100 block of Spencer Highway, right next to Pasadena Auto Planet.

The used car lot is run by Eric Mejia and his family. Heat from the fire severely damaged about a dozen vehicles on the lot as well as the sales office.

Raw video: Massive warehouse fire in South Houston

“So we’re going to move our inventory to a different lot so we’re going to keep operating,” said Mejia.

A two story building, once an orange juice factory, caught fire and send a huge plume of smoke and flames into the skies over South Houston.

CenterPoint crews had to wait for the fire to be under control to access the affected power lines and a transformer that blew.

Firefighters from the City of Houston responded to assist after water issues delayed initial firefighting efforts.

There were no injuries, but the building was destroyed.

The cause of the fire is under investigation, but Fire Marshal Charles Stulder says, “It’s going to be a tough one to investigate.” Pasadena sent its arson dog which walked through the scene and failed to smell any accelerants.

So some samples of the debris will be sent off and tested for accelerants. Right now the cause is ruled “undetermined.”