Several Houston-area refineries were shut down Sunday as Tropical Storm Harvey continued to drench the area, taking roughly 12% of U.S. fuel-making capacity out of commission and compounding concerns about fuel shortages in coming days. Exxon Mobil Corp. closed its massive Baytown refinery in a Houston suburb—the second largest in the U.S.—as torrential floodwaters from the storm paralyzed large portions of the area even after it was downgraded from a hurricane. The plant, located on the Houston Ship Channel, can process up to 560,000 barrels of oil a day and feeds fuel into pipelines and barges that move it from Texas to states across the southeast and up the East Coast. Royal Dutch Shell PLC confirmed it stopped making fuel at its 325,000-barrel-a-day plant in Deer Park, Texas, and Brazil’s state-controlled oil company, Petróleo Brasileiro SA, shut down its Pasadena […]