[sqrlrgwright]

I doubt your estimates of the impact. For example, of the 124 airports in Florida, only 2 are below 1 meter elevation (St George Island and Key West International), only 16 are below 3 meters. So I doubt 1/3 of the worlds airports would flood, or for that matter 1/3 of the roads in the Gulf Coast.

[hyperbovine]

Sorry, you are partially correct. I looked up the airport stat and it's specific to the Caribbean, not worldwide. Regarding the other claim however:

“It is estimated that a hypothetical 1 m rise in relative sea level projected for the Gulf Coast region between Alabama and Houston over the next 50-100 years would permanently flood a third of the region’s roads as well as putting more than 70% of the region’s ports at risk,” the IPCC said.

http://www.rtcc.org/2014/03/26/long-term-sea-level-rise-will...

[dredmorbius]

Note that ocean rise in tropical / subtropical regions is also exacerbated by thermal expansion of water. How much this contributes I'm not entirely sure.

Florida in particular also has a little issue you may have heard of with sinkholes. The geology is generally limestone, and this can be undercut by water and other effects. There's also the matter of saltwater intrusion on freshwater supplies and flora, as well as other secondary effects of seawater rise.

So I wouldn't be too sanguine.