The nation's largest refiner, Motiva, which is located in Port Arthur announced they'd be shutting down operations until flood waters had left the area. Motiva is only one of many plants in the gulf area that have had to shutdown because of hurricane Harvey. The second largest refinery in the country, Exxon Mobil's Houston area Baytown plant had already shutdown earlier in the week along with dozens of other smaller refineries. The large cut to production has led to a spike in gas prices across the country. The longevity of these spikes in prices will depend largely on the level of damage done to refinery operations in the gulf, which is still unclear at this point.