While others debate the issue, Florida is dealing with it.
See this article about the "current" impacts of sea rise and climate change happening today in the state of Florida.
Human waste issues will beget many other health impacts, so it is not just a couple of inches of flooding in the streets on sunny days that needs to be dealt with.
Every one of the impacts mentioned in the article has an emergency management context. As I've written about before, as this topic gets more airing in the public market place, property values and new real estate developments will finally begin to fall — that will then finally get politicians' attention.
In Florida anyway ...