A massive fire erupted Thursday night at a refinery in Southern California, Fox11 reports.

Firefighters were dispatched around 9:35 p.m. local time to the Chevron refinery in El Segundo after receiving calls of smoke in the area.

Fire departments throughout the South Bay were called in to help.

The refinery spans two-square-miles, supplying more than 40% of jet fuel and more than 20% of motor vehicle fuel across all of Southern California. It's the largest producing oil refinery on the West Coast.

There are 1,000 Chevron employees, 1,000 contractors on any given day and their very own Chevron Fire Department with 24 full-time firefighters.

The refinery maintains its ability to make roughly 12 million gallons of fuel every day, that's enough gasoline to fill up a million cars a day.

When the refinery was built in 1911, the original capacity was 5,000 barrels a day, but today it can process 290,000 daily.

California has approximately 1,300 Chevron stations.