The Florida Fire Marshall's office is still trying to determine what caused a Panama City Beach business to catch fire.

Crews responded to a blaze at "Sunsations," a t-shirt and souvenir shop on Front Beach Road. The fire tore it's way through the roof and threatened nearby buildings.

It resulted in traffic having to be re-routed for several hours.

Several firefighters were treated for heat exhaustion. No one was inside at the time.

It's believed that the fire started in the front of the business.