The video isn't embeddable, so you'll have to go there to watch it. But it's worth the 15 minutes. It's a very visceral portrait of real people dealing with the economic and emotional consequences of the rising sea level that is slowly drowning their much loved community. Trump should watch it.
New Jersey's Blue Acres program has been buying out homes there, about 300 of 1500 in five years, after the devastation of Hurricane Sandy in 2012. This is going to happen along coasts everywhere -- it will be taxpayers who make home owners whole, because the homeowners can't be expected to just write off the value of their largest asset. It also shows how the demise of these communities will accelerate once it begins, as their tax base erodes as people begin leaving and the land left behind turns into tax-exempt open spaces. (Money Island has lost $15 million off their tax base so far.) That leaves less money to deal with the effects of rising tides on roads and other infrastructure. It's a downward spiral.
The operative word is "undevelopment." We're going to be seeing a lot more of that as time goes by.