HOUSTON, May 7 (Reuters) - A fire burned for a third day on Sunday at Shell Plc's (SHEL.L) chemical plant in the Houston suburb of Deer Park, Texas, a company spokesperson said.
The fire initially ignited on Friday afternoon in an explosion in an olefins unit, used to make plastics and rubber.
The fire was extinguished for a few hours on Saturday morning before it reignited around 3 p.m. CDT (2000 GMT), said Shell spokesperson Curtis Smith.
Water runoff has exceeded the chemical plant's wastewater capacity and is being diverted into the Houston Ship Channel, Smith said.
Olefins units are the central units in petrochemical complexes, producing ethylene, butadiene and propylene from hydrocarbon feedstocks.