The blast erupted inside the sprawling Gulf Coast facility shortly after midday, shaking nearby neighborhoods and prompting officials to warn residents to stay indoors as fire crews and industrial?hazmat teams rushed to contain the incident. The explosion produced a thick plume visible for miles across Southeast Texas, adding new scrutiny to one of the nation's largest refining corridors as authorities worked to determine the cause of the blast and assess potential hazards.

Port Arthur Fire Department spokesperson told 12News NBC that the cause of the explosion and fire is unknown at this time. Jefferson County Sheriff Zena Stephens said there were no injuries and no evacuations were ordered.