If this is actually a credible report, then the U.S. government needs to stop funding the rebuilding/construction of areas that are CURRENTLY under sea level like New Orleans and the dikes and berms around it. No more federal funds of any kind for regions currently under water!
By that logic we should just write off large swathes of the Netherlands. Dykes and berms work just fine, and we have the engineering means to keep portions of land we consider valuable dry even if the waters rise 10 or 20 feet. New Orleans would fit in this category in my opinion. It is a unique part of American heritage and a cultural gem (one of not-so-many the US possesses), well worth the investment of Federal dollars to keep around.
Not to mention that it is by far less expensive to retain land by shoring up or building new dykes, than it is to reclaim land already submerged. Not as cheap as ditching it of course, but in places where it is worthwhile (New York City, Hoboken, New Orleans, Holland, and various other places) it is much smarter to keep existing places dry than leave them to be inundated and then realize our mistake later and either lose them forever, or pay even more to reclaim them.