its not about buying a "house by the beach".
its not about vacation property.
although indonesia being wholly an island nation has its own particularly unique set of problems to be able to get warning of tsunami, this needs to be seen as a global problem.
indonesia's tsunami problem, and other countries' sea rising and shoreline erosion problems, although not related, do have similarity as to real world decisions about where we need to even abandon habitation due to sheer costs and scope of work that is required to make it safer.
Java, Maldives, Louisiana Bayou, New Jersey shore, Thames River, Manhattan, Florida.
zones that can be considered safe for human habitation are being re-evaluated.
rise in insurance costs first. then comes local tax increases to try to deal with the problem. then abandonment of these zones when its realized that the costs of continued habitation in these areas cannot be sustained.