Valero Energy refinery explosion causes thick smoke; air quality monitoring underway.
A loud explosion was reported at a refinery operated by Valero Energy in Port Arthur, Texas, prompting officials to issue a shelter-in-place order for nearby residents. Thick plumes of black smoke were seen rising into the sky, while videos circulating online captured the sound of a loud blast moments.
The incident is still being investigated. The explosion was reported on March 23 at approximately 7:22 p.m.
AUDIO: Sound of explosion at Valero refinery in Port Arthur, Texas. Shelter in place for nearby residents.
pic.twitter.com/whdclAFsuP— AZ Intel (@AZ_Intel_) March 24, 2026
Blast, smoke and emergency response
According to The Deep Dive, eyewitnesses described hearing a loud explosion that shook nearby homes, followed by visible flames and dense smoke billowing from the refinery site.
JUST IN: Explosion reported at Valero refinery in Port Arthur, Texas with nearby residents ordered to shelter in place.pic.twitter.com/WIYNvD9mAI
— The Dive Feed (@TheDeepDiveFeed) March 24, 2026
Antonio Mitchell of the Port Arthur Fire Department said, “We don’t have units at the scene currently; they’re en route. The type of incident is unknown at this time.”
Emergency responders, including fire crews and hazmat teams, were deployed to contain the situation. They confirmed an active situation; however, they have not released any detailed information.
So far, no injuries have been recorded, and authorities have stated that evacuations are not currently necessary.
Officials said air quality monitoring is underway to determine whether toxic substances have been released into the surrounding area. The shelter-in-place order will remain in effect until it is deemed safe for residents to resume normal activities.
In order to maintain safety and support emergency operations, the Texas Department of Transportation has also advised drivers to avoid SH 87 and SH 82 in the vicinity of the refinery, the Deep Dive reported.
One of the largest refineries in the US
The Valero Port Arthur Refinery, located on the Texas Gulf Coast about 90 miles east of Houston, is a large operation employing approximately 770 individuals. It can produce 435,000 barrels per day of gasoline, diesel, and jet fuel from heavy sour crude oil.
Aerial footage shows the massive fire at the Valero refinery in Port Arthur, Texas following an explosion.
IRGC affiliated accounts claim
“Sabotage” pic.twitter.com/HvnQ2wSMEL— Open Source Intel (@Osint613) March 24, 2026
If operations are stopped for an extended period of time at such a crucial energy center, the consequences could be far-reaching for regional fuel supply chains, per the Deep Dive.