Think of the High Tech Infrastructure at Risk
Many of the major cities in the world are built near tidal water and salty sea water is definitely the most damaging to things electronic.
Visitors to the St, John's River Valley, including as far inland as Fredericton, New Brunswick (Canada) often ask why telephone junction boxes for underground cables are mounted on posts 2 metres high. It is because the floods that occur annually. Now.
Here in Ho Chi Minh City/SaiGon, 30% of the city is vulnerable TODAY from monthly floods that occur when the leap tides happen around. The city is riddled with streams and canals that look innocent enough but when the SaiGon River rises (about a metre) all those benign water courses become THE enemy as water backs up through the sewers and in to homes.
It gives a whole new perspective on flooding.
Added to this is the fact that illegal water extraction by industry is equal to the official water extraction is causing the land mass to slink, as is occurring in Venice.
It's alright laughing at these predictors of gloom but when you can't leave your hotel without risk of literally drowning, t brings the whole discussion real up close.
I live at 4,500 feet ASL in the Central Highlands, so I am OK for a few more years but millions of people would be displaced in VietNam alone even if the water rose 50 centimetres.
Think of London, those flood gates are good only until 2050l and then the water will simply flow around them and flood much of London. New York is particularly vulnerable. The Mississippi already floods annually, damaging millions of acres of land, another metre and you have a serious problem not even the Army Corps of Engineers could conquer.
During the Cold War years communications networks were routed around major population centres, presumed to be nuclear bomb targets, now we better start planning around flood plains.