WATCH: Palm Bay firefighters extinguish explosion flames at chemical plant

Witnesses say they saw a large fireball in the sky this morning as an explosion shook the ground.

Orlando, Fla. — An explosion near an industrial site in southern Brevard County caused a fire that shut down U.S. Highway 1, according to the Palm Bay Police Department.

The explosion happened at about 10:30 a.m. at the chemical facility FAR Chemical, Inc. near Robert J. Conlan Boulevard and U.S. 1.

“You could feel how hot the explosion was just standing there,” a witness told WFTV Channel 9.

App users, see live chopper footage here.

The cause of the explosion remains unclear.

Brevard County Fire Rescue said they are helping respond to the scene with ladder trucks and hazmat crews to what they described as a “significant fire.”

No injuries have been reported.