Smoke reportedly filling a commercial / warehouse building on Scarlet Drive off of Highway 6&50. Smoke is originating from a bathroom area inside the building. Due to the size of the building, a large amount of fire resources have been dispatched as a precaution. Fire crews arriving on scene are reporting heavy smoke from the bathroom. Source is a burned up ceiling fan that caught fire, however the fire is out. Crews are working to ventilate smoke out of the structure.