( Why does there always have to be a sarcastic note ? "A few sandbags", I assume you don't live close to sea level, and have never had to deal with flooding ).
The rise in sea level would not be consistent around the World, some areas will see only a few inches, others well over 2 feet, if that average is maintained. I wouldn't want to be living in Micronesia, or much of coastal Bangladesh. A bigger direct threat to coastal communities around the globe will be increased energy in storms, leading to stronger and more sustained wind speeds, and higher storm surges.