Valero Port Arthur refinery: a month after the explosion

More than a month has passed since an explosion and fire damaged one of the diesel hydrotreaters (DHT 243) at Valero's 415,000 b/d Port Arthur, Texas, refinery. The facility has since entered a phased recovery, with select units returning to service while repair work continues in the areas most affected by the March 23 incident.

Wood Mackenzie has tracked the refinery's progress through continuous aerial surveillance and ground-based monitoring since the explosion occurred. Our imagery reveals ongoing reconstruction efforts at the damaged sections, while our field-based infrared cameras have documented the sequential restart of multiple processing units following the plant-wide shutdown.

The most recent milestone came on 26 April, when the refinery's fluid catalytic cracker (FCC) resumed operations. That same morning, operators began ramping up the facility's largest crude unit, though activity levels remain below normal operating capacity. While the affected diesel hydrotreater falls outside our real-time infrared monitoring coverage, Wood Mackenzie's multi-source surveillance has provided a comprehensive view of the recovery timeline.

Monitored unit status as of morning, 30 April:  

Collateral impact and recovery

The incident's effects extended beyond Valero's fence line. Diamond Green's adjacent renewable diesel facility, which relies on steam and utilities from the Valero refinery, was forced offline immediately following the explosion. Wood Mackenzie's biofuels monitoring confirmed the plant returned to service in late March, demonstrating a relatively swift recovery for the dependent facility.

Damage assessment and repair progress

Aerial imagery captured in the immediate aftermath revealed the explosion's epicentre: DHT 243 sustained the most severe structural damage, with collapsed and heavily warped piping throughout the unit. Adjacent infrastructure also bore the brunt of the incident—a neighbouring processing unit showed minor damage, while two cooling towers and a control room in the blast radius sustained more significant impacts.

In the weeks since, repair activity has concentrated on the damaged cooling towers, which have seen the most intensive reconstruction efforts. Scaffolding and crane operations have been a near-constant presence at these structures, and recent imagery shows contractors have begun dismantling components, including cooling fan blades, as part of the restoration work.

Analysis: extended outage adds pressure to tight markets

More than a month on, Valero's Port Arthur refinery remains in partial recovery mode. While the recent restart of the FCC and the initial ramp-up of the primary crude unit signal progress, multiple processing units were still offline as of 27 April—including full operation of the facility's largest crude distillation capacity.

The extended outage comes at a particularly challenging moment for regional refined product balances. Ongoing geopolitical tensions in the Middle East have already introduced volatility into crude and product markets, raising concerns about supply adequacy. The prolonged absence of 415,000 b/d of refining capacity on the US Gulf Coast only compounds these pressures.

Wood Mackenzie's real-time monitoring infrastructure—combining field-based infrared cameras with regular aerial surveillance—continues to track the facility's unit-by-unit recovery, providing clients with independent, data-driven insights into outage duration and restart timelines.

How We're Tracking This

During periods of market volatility following a disruption, timely, data-driven insight is essential. Wood Mackenzie subscribers received unit-by-unit restart analysis within 24 hours of each milestone event, including the FCC return on 26 April and crude unit ramp-up—intelligence that informed real-time trading and operational decisions while recovery was still unfolding.

We provide both historical context and real-time intelligence on Valero's Port Arthur refinery through the following core services:

Fill in the form if you would like to learn how our real-time monitoring can support your market decisions.