These are the present day planning and implementations of 8 US coastal cities to mitigate flooding. There is a lot to digest but I looked at Miami Beach as a harbinger: $6,500 per capita of populace* now, who knows how much later. That is just for routine flooding. Large storms are unpaid and unplanned, and they use past flooding history to anticipate future flooding.

*
93,000 population
$600,000,000 new fees and taxes