Possible new game idea or mod for an existing game...

[Lincoln7]

http://now.msn.com/nickolay-lamm-shows-cities-underwater-after-climate-change?Gt1=50501

These pics got me thinking that this would be a fun and interesting game or even as a mod to an existing FPS game like COD4, L4D 1 or 2, or really any kind of FPS.  Running around (or in this case, swimming or rafting around) partially submerged coastal cities and other urban environments would be fun and introduce a challenging aspect to the typical FPS, IMHO.