Well, there is this place called the Jersey Shore with a lot of valuable real estate that got flooded. Likewise with a place called Long Island. But we all know how cheap real estate is in NYC, so it can't cost that much when a large part of the city gets flooded. Dittoes when the subways flood and five million people now can't get to work for at least a week.
Hope you are being sarcastic. New York City has the most expensive housing in the US.