AN explosion has rocked a chemical plant in Louisiana, sparking a raging inferno and sending thick smoke billowing into the air.

Evacuation orders are in place as health fears are raised after locals say they can “taste the air” as oily rain continues to cover Roseland, a town 50 miles northeast of Baton Rouge.

The explosion at the Smitty’s Supply plant that manufactures lubricants for vehicles took place on Friday afternoon, but officials are still fighting to extinguish the blaze.

In an update on Saturday night, the fire was 90% contained.

No one has been injured in the shocking incident, which Tangipahoa Parish President Robby Miller said was a “godsend”.

However, as the fire continues to burn at the plant sending chemicals into the sky, locals say they are being showered with oil and reporting concerning health issues.