I find it implausible that some of the richest and most densely populated cities in America would just passively await submersion for decades when this could be averted with good old levees.
What I do believe is that a major UN climate conference is starting today in Doha and that their PR people yet again managed to sell the idea of disaster to the newspapers.
Just have the levees built and maintained by private enterprise rather than U.S. Army Corps of Engineers and you should be all golden with no unexpected problems or failures
In terms of this, I've thought of a joke to get people more aware of global warming.
Sell a piece of land a few kilometres in for a lot of money, citing it's major benefit as future beachfront property (put ads in local paper, etc). If anyone actually decides to buy it at that price, cover your losses and donate the rest to WWF or Charity:Water.