It's said to be a done deal, just the matter of a few centuries at the outside. That's how long it's expected to take to melt all the great ice fields of the Earth. The Arctic sea ice will disappear first, followed by the world's glaciers and then the Greenland ice sheet. All the while the Antarctic ice sheet will continue to melt into the sea.
So, what's that going to look like say to the average Vancouverite? Maybe something a lot like this:
As we lose those ice sheets and glaciers we can expect sea level rise of about 80 metres, maybe more. That would leave the Lower Mainland looking something like this. The waterfront cities of North and West Vancouver, gone. Stanley Park, ditto. The superprime downtown area and the toney communities along what once was English Bay, Jericho and the north shore of the Fraser, completely submerged. No need to dwell on already low-lying municipalities like Richmond, Delta and White Rock. They would have been among the first to succumb, their populations evacuated presumably to high ground in the interior.
It's madness yet this is the path we are taking. Madness.