RedactedNarrative: On May 3, 2015 at or around 1130 hours, 4 persons were on board a moored Nautaline Houseboat that had taken on fuel at Paris Landing State Park Marina.   When the operator turned over the engines, there was an explosion at the back of the boat that blew open the engine hatches and fire entered the galley area burning the legs of one of the occupants.   Everyone was able to get off the vessel and it was pushed away from the fuel dock. The Nautaline was quickly engulfed in flames and sank after it came to rest against an unoccupied dock.   The burned female sustained 1st , 2nd and 3rd degree burns to her lower extremities  and received treatment at Vanderbilt Medical Center.