One of the largest oil refineries in the United States exploded and caught fire, with a daily production capacity of 395,000 barrels; oil prices rebounded significantly!

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A major accident occurred at a key U.S. refinery, combined with escalating geopolitical tensions in Iran, driving a rapid rebound in international oil prices in a single day.

On March 23 local time, an explosion and large-scale fire broke out at the Valero refinery in Port Arthur, Texas. According to Bloomberg, citing informed sources, the fire originated in the diesel hydrodesulfurization unit, which suffered severe damage, and the fire spread to the nearby fluid catalytic cracking (FCC) unit area. Some facilities at the refinery have been shut down, while a full shutdown is still awaiting the final decision from management.

On the same day, multiple key energy nodes in Iran were hit by airstrikes again. Although U.S. President Trump had just announced a five-day postponement of strikes on the Iranian energy network, local media reported that early on March 24, energy facilities in Isfahan and Khorramshahr were attacked by the U.S. and Israel.

Details indicate that on Kaveh Street, north of Isfahan, a natural gas management building and a pressure reducing station were attacked, resulting in partial facility damage and affecting nearby residences. Due to Iran taking preventative safety measures, the station had already been taken offline before the attack, thus “preventing a large-scale explosion.”

Influenced by news of the refinery explosion, along with the latest reports of escalating conflict in Iran, WTI crude oil prices rebounded sharply from an intraday low of $85 per barrel to above $90, most recently rising to $91.63 per barrel.

According to CCTV News, the Valero refinery processes about 395,000 barrels of crude oil per day, making it one of the top ten refineries in the United States and a key link in the U.S. energy supply chain. Currently, U.S. retail gasoline prices have exceeded $3.90 per gallon. Analysts point out that if the plant is shut down for a long period, it will put even greater pressure on the already tight energy market.

Severe Damage to Hydroprocessing Unit, Partial Shutdown at Refinery

According to CCTV News, the accident occurred on March 23 local time, with the explosion’s powerful shockwave shaking car windows throughout the Mid-County area. Eyewitnesses reported a rotten egg odor near the scene, suggesting the presence of sulfur in the air.

Sources said the fire originated from a diesel hydroprocessing unit, which was severely damaged. The fire broke out next to the refinery's fluid catalytic cracking unit. The refinery has since partially shut down, but according to sources, a decision has not been made to close the entire plant.

Multiple sources indicate the accident may have been caused by a malfunction in industrial heating equipment. Antonio Mitchell of the Port Arthur Fire Department confirmed the incident but said “the type of accident has not yet been determined.” A spokesperson for Valero stated all employees have been accounted for and only a few minor injuries were reported.

In terms of emergency response, acting Port Arthur fire chief Louie Havens said two fire engines were first sent to the scene, along with a hazardous materials handling team. The Beaumont Fire Department and Jeff Davis County Sheriff's Office participated in the rescue. The Texas Commission on Environmental Quality also dispatched air quality monitoring personnel to the scene to monitor ambient air in real time. For safety reasons, local officials closed two state highways near the refinery.

Critical Production Node, Shutdown Impact Weighs on Market

The Valero Port Arthur refinery is a critical link in the U.S. energy supply chain. The plant processes up to 435,000 barrels of heavy, high-sulfur crude oil per day, making it one of the top ten refineries in the United States and a key source of domestic refined oil products.

After the accident, oil prices reacted swiftly. WTI crude fell as low as $85 per barrel in the morning session, but as news of the explosion spread, together with the latest tensions in Iran, prices quickly rebounded above $90. The rapid lift in oil prices further pressured the equity markets, with stock index futures giving up early gains.

Analysts pointed out that if this refinery remains shut down for an extended period, gasoline supply, which was already tight, will be further squeezed. Currently, the average price of gasoline in the U.S. has exceeded $3.90 per gallon, and if the refining capacity gap continues to widen, end-user fuel prices face further upward risk.

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