Massive offshore and onshore storage of LNG have addressed the public concerns on all possible hazards on people and other installations either onshore or on ship. A discussion on blast waves produced by rapid phase transition of LNG on water covers risks related to the release of large amount of LNG; possible accidental scenarios; the phenomenon of Rapid Phase Transition (RPT); use of an acoustic model to define explosion pressure and total energy produced by the RPT of LNG; significant impacts to public safety and property from accidental spills; and acoustic evaluation of pressure wave produced by the rapid phase transition of LNG released accidentally on water. This is an abstract of a paper presented at the 42nd Loss Prevention Symposium (New Orleans, LA 4/6-10/2008)