I lived in Norfolk, VA from 1996 - 2001. I lived in an apartment building that was along a minor branch of a local river. The first year I was there, all was fine. The second year, the parking lot would flood slightly when a big storm came. The third year, 1/4 of the parking lot was flooded during a big storm. The following year, a woman's car was actually picked up out of the parking lot during a storm and carried into the river. By the time we moved away, if any tropical storm was intown, half the roads in the city were flooded and un-passable. I don't know what it's like there now.
I would not buy any real estate near the ocean, and if I had some, I would be looking to sell. I don't know why people are in denial about what is right in front of their face.
With regards to the ice age vs. global warming - they may not be mutually exclusive. Surprisingly, the ice melting in the arctic could cause Europe or parts of the world to experience a mini ice-age. According to Gore's movie, at the end of the last ice age, the glacial ices covering north america (canada area) melted. The cold water went into the ocean and the main ocean current in the North Atlantic stopped - causing Europe to experience 100 years of ice-age, even though the world as a whole was getting warmer. It's possible a similar thing could happen when the greenland ice melts. We will have to wait and see.