"estimated that inundation impacts on Oahu alone could cost $11.8 billion, "
Oh.. that is not so bad, its not even how much rail will cost. I am sure the mayor has a plan to take care of it.  Everyone that re-elected him, put your total trust and faith he will take care of it.
.
Seriously though, where can we get a look at these maps ?
In Nanakuli, Maili, Waianae, the beaches and Farrington in many areas are at higher elevations than the residential areas, the beaches are more like break walls. If the water crests the beaches, the residential areas will be under water. It happens quite a bit right now when it rains hard and Farrington floods.  When we look out the front door of our internet cafe across the street to the beach, we are looking "up hill."  The side street next our building is regularly under a foot of water. Cant imagine if the sea is up another foot or so how much more often that would happen.