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.
That turns out to be harder than you would think.
Uh no. No it isn't, at least, not to do a pretty decent job. You just don't give any funding for rebuilding, you prohibit any funding given for other purposes from being used for rebuilding, and you prohibit any disaster relief check recipients from using the money for buying back into their ruined communities. Some people will do it anyway, spend the minimum effort preventing that during the escrow process, some people will slip through but you can catch most of 'em.
You may not be able to stop people from moving back into those neighborhoods, but you sure can avoid spending money on it, at least most of it.