Smoke from the blaze rose high over the area, The Daily News of Galveston reported. The fire was reported at about 1:30 p.m. and was out by 3:05 p.m.
Bruce Clawson, the homeland security coordinator in Texas City, said the fire was in heavy "bottom" crude oil.
Ruth Rendon, a spokeswoman for BP, said all workers at the Resid Hydrofitting Unit were accounted for. She said there appeared to be no serious injuries.