Firefighters and emergency workers responded to an explosion Monday morning at Valero's 130,000 barrel per day refinery in Houston, local television reported. There were no immediate reports of injuries. A local telephone service that warns residents near Houston's refineries when problems occur said there had been an “incident” at the refinery, causing sulfur fumes to be released from a tank. The Houston fire department ordered residents of the Manchester neighborhood to remain in their homes, KHOU reported. The television station showed video of a burning tank at the refinery, and debris could be seen on the ground near the tank.
