Chevron Houston refinery launches storm shutdown as Tropical Storm Edouard bears down on Texas coast
Chevron has begun suspending operations at its Houston-area refinery ahead of Tropical Storm Edouard, which also threatens Marathon's 631,000 b/d Galveston Bay plant.
Chevron is shutting down its Houston refinery as Tropical Storm Edouard closes in on the upper Texas coast, with forecasters warning the storm could strengthen before landfall on Tuesday (2026-09-01). The shutdown adds to a refining system already running without roughly 400,000 b/d of capacity idled by the earlier closures of the LyondellBasell Houston and Phillips 66 Los Angeles plants, according to EIA data.6,3
Gulf Coast refining was already absorbing that loss when Edouard materialized. The EIA's annual Refinery Capacity Report, published June 29 (2026-06-29), showed U.S. operable atmospheric distillation capacity at 18.2 million barrels per calendar day on January 1, 2026, down over 250,000 b/cd (about 1%) versus January 1, 2025. The LyondellBasell closure cut Gulf Coast regional capacity by about 3%, a smaller share because PADD 3 produces more fuel than it consumes. Offset by marginal gains elsewhere, regional capacity fell by less than 2% during 2025.3
Edouard threatens facilities beyond Chevron's plant. Five of the seven largest refineries in the country sit in Texas, according to EIA data, with several in the storm's projected corridor. Motiva's Port Arthur refinery carries a crude processing capacity of 656,400 barrels per calendar day by EIA measure. Marathon's Galveston Bay plant has a crude refining capacity of 631,000 b/cd.6
Marathon's Galveston Bay refinery sits squarely in the storm's projected track. But the company had not announced a shutdown as of Sunday (2026-09-06), and product traders are watching closely given the plant's size and location. Gulf Coast operable refining capacity in PADD 3 was estimated at 9.88 million b/d as of January 1, 2026, according to EIA data.6
The Harvey comparison is instructive. When Hurricane Harvey struck in August 2017, a large concentration of Gulf Coast refining capacity went offline simultaneously, sending pump prices higher and temporarily rerouting oil and gasoline flows worldwide. Recovery took days to weeks for some facilities in southeast Texas.1
Chevron's response to Tropical Storm Bertha in July (2026-07-21) offers a more recent data point. The company shut in production at its Petronius facility and moved all personnel onshore. Earth Science Associates' GOMsmart platform projected mean production losses of 1.899 million barrels of oil and 3.369 billion cubic feet of gas from that storm.5
Bertha hit offshore production. Edouard targets the coast directly, meaning the disruption risk centers on the refining system that converts crude into gasoline and diesel. NYMEX gasoline front-month stood at $3.20 per gallon and NYMEX Heating Oil front-month at $4.55 per gallon as of Sunday (2026-09-06), with US markets closed for the weekend. ICE Brent crude front-month was at $94.97 per barrel and NYMEX WTI front-month at $91.22 per barrel as of Sunday (2026-09-06).6
The storm also raises questions about facility preparedness. The Environmental Protection Agency updated its Risk Management Program rule in 2024 to require facilities to assess natural hazard and climate-change risks and grant the public greater access to information. The Trump EPA has since proposed removing those enhancements, arguing they impose unnecessary burdens on facility owners.4
Chevron has not said when it expects the Houston refinery to resume operations. The company's experience with a tropical cyclone disrupting its Australian LNG plants in March (2026-03-27) showed that weather-related outages can take time to unwind, straining supply chains well beyond the immediate region.2
Harvey's aftermath showed that flooding after a storm's passage often prolongs outages far beyond the event itself. Whether Marathon announces a Galveston Bay shutdown, and how long Chevron's Houston plant stays offline, are the signals product markets are waiting for.1