A massive explosion at a Texas crude oil refinery shot up towering plumes of dark smoke and physically shook locals’ homes before they were ordered to shelter in place Monday.

A loud boom resounded throughout the western part of Port Arthur, Texas on Monday afternoon when part of a Valero refinery exploded, local outlets reported.

Clouds of black smoke spilled out of the refinery, sparking health concerns among residents and forcing city officials to put out a shelter-in-place order for the west end.

One resident at the scene told 12News that the entire area reeked of rotten eggs — a smell commonly associated with sulfur.

An oil refinery fire with a large plume of black smoke rising into the sky.
An explosion at a Valero oil refinery in Texas on Monday led to a shelter-in-place order.KFDM

An oil refinery with a large fire and thick black smoke rising into the sky.
Flames and black smoke spewed out of the site.kplctv
Others told the outlet that the explosion rattled their homes and vehicles.

Jefferson County Sheriff Zena Stephens suggested that the explosion may be linked to a mishap with a heating unit at the refinery, the outlet reported.

Officials monitored the air quality in the area throughout the day as the smoke from the refinery blanketed the sky.

No injuries were reported as of Monday evening. A representative for the Valero Energy Corporation told The Post that all personnel at the refinery were accounted for.

A fire erupts at a refinery or chemical plant, with large flames and thick black smoke billowing into the sky.
No injuries have been reported so far.kplctv
The Valero Port Arthur Refinery sits near the Texas Gulf coast and along the Texas-Louisiana border. The facility employs roughly 770 workers and is responsible for producing upwards of 435,000 barrels of gasoline, diesel and jet fuel daily.

Locals who felt the tremors caused by the explosion were shocked that officials didn’t move to evacuate the city.

An oil refinery explosion with a large plume of black smoke and orange flames.
The refinery produces gasoline, diesel and jet fuel.kplctv
“Until it’s quiet, we have to evacuate,” one woman wrote on Facebook.

“I’m thinking those chemicals can reach more then just that area,” another woman from Groves, Texas, just six miles outside of Port Arthur, added.

“It’s still in the air all over not just the west,” one man noted.