Why the armageddon claims ? You realize humans have previously coped just fine with water levels meters higher than they are now I hope.
So given that the worst IPCC predictions only predict about a 2m water level rise, and that so far the first 20 years of those predictions turned out to have been WAY overblown, I think we'll do just fine as a species, even long term.
In fact, even if worst comes to worst, medieval water management techniques will in fact be able to prevent any coastline encroachment until well into the 2200s. At that point, I think we may put some thought into adapting, and I bet we'll be able to come up with something (or we could just move a few cities. That too has been done before. Okay, okay, more than "a few". And no, we won't run out of arable land, or water, or ... I mean it's unknown of course, but it's not out of the question that the planet actually becomes more hospitable to humans with higher temperatures. Certainly in a few regions that will be true, and maybe globally).
TLDR: you will be perfectly fine, even under the worst of the worst predictions, and so will California beachfront property, or Manhattan, or ... at the very least for 4-5 generations.
So given that the worst IPCC predictions only predict about a 2m water level rise, and that so far the first 20 years of those predictions turned out to have been WAY overblown, I think we'll do just fine as a species, even long term.
In fact, even if worst comes to worst, medieval water management techniques will in fact be able to prevent any coastline encroachment until well into the 2200s. At that point, I think we may put some thought into adapting, and I bet we'll be able to come up with something (or we could just move a few cities. That too has been done before. Okay, okay, more than "a few". And no, we won't run out of arable land, or water, or ... I mean it's unknown of course, but it's not out of the question that the planet actually becomes more hospitable to humans with higher temperatures. Certainly in a few regions that will be true, and maybe globally).
TLDR: you will be perfectly fine, even under the worst of the worst predictions, and so will California beachfront property, or Manhattan, or ... at the very least for 4-5 generations.