Explosion at US oil refinery sparks fire and shelter warning

A powerful explosion at a US oil refinery in Port Arthur, Texas has triggered a large fire, sending thick smoke into the sky and prompting authorities to order nearby residents to shelter in place.

The blast occurred at a refinery owned by Valero, which employs around 770 workers and processes up to 435,000 barrels of oil per day into fuels such as gasoline, diesel and jet fuel.

Emergency services instructed residents, particularly on the west side of the city, to remain indoors while the situation is assessed. The Texas Department of Transportation also advised motorists to avoid the area. No evacuation orders have been issued so far.

Officials said there were no immediate reports of injuries, while air quality in the surrounding area is being closely monitored. The cause of the explosion remains unclear, although early indications suggest it may have been linked to an industrial heater.

Witnesses reported hearing a loud explosion that shook buildings and rattled windows, while some residents described a strong odor similar to rotten eggs in the air.

The incident comes at a sensitive time for global energy markets, already under pressure due to disruptions linked to the ongoing Middle East conflict. The Strait of Hormuz, a critical route for global oil shipments, has been largely restricted, contributing to supply shortages and pushing oil prices close to $100 per barrel.

The disruption at one of the United States’ major refineries could further strain fuel supplies, as analysts warn of continued volatility in global energy markets.

Meanwhile, US President Donald Trump said the United States and Iran have held productive talks aimed at easing tensions, announcing a temporary pause on planned strikes against Iranian energy infrastructure as negotiations continue.