RedactedNarrative: Vessel #1 was tied to the dock on fire and the fire extended to the dock and vessel #2.  The fire on vessel #1 caused a failure in the lines securing it to the dock and vessel #1 drifted into vessel #3 while it was still on fire.  Vessel #1 then drifted into vessel #4 causing that vessel to catch on fire.  Vessel #4 had a failure in the lines due to fie and was located adrift approximately 500 yards south of its dock.  The origin of the fire on vessel #1 is undetermined due to the lack of vessel left over after the fire.  Owner stated fireworks were being shot off all night in the vicinity but no fireworks in the remnants of vessel #1.