Baytown police say officials at the plant at 4500 Bayway Drive called to inform them of the blaze and asked the city to put ambulances on standby, which is standard protocol.
SkyEye 13 HD captured flames coming out of a column at the plant. Baytown police say what caught fire appears to be a diesel product that does not pose any environmental hazard and no shelters in place will be imposed.
Officials with ExxonMobil say no one was injured, but an investigation into how the blaze started is ongoing.
In a prepared statement, ExxonMobil Spokeswoman Rachael Moore said the company's emergency response teams were brought in to get the incident under control.
"As a precaution, our Industrial Hygiene staff is doing air quality monitoring around the complex and in the community," Moore said. "We apologize for any inconvenience this may cause to the community and will update you when we have additional information."
Stay with Eyewitness News and abc13.com for the latest on this story.
And if you have photos or video of the fire, email it to news@abc13.com. But please don't put yourself in harm's way to get the shot.
