Here's how North America will likely look after severe ocean rise. Worried about the Amazon rainforest? You won't save it from this. And don't forget Europe.
You can see why the Maldives is concerned. Their highest land is only 7'7" above sea level, and the average is 4'11. It'll take a lot less than global devastation to sink them, and they can already see the brutal treatment of other refugees. What's going to happen to all the island nations as the world's waters rise up? Nothing good.