> I am far more concerned with people in Phillipines, Micronesia, Vanuatu etc who are at risk of losing their homes and livelihoods and literally having no where else to go.

Wouldn't they be able to reach other countries by boat/ferry? With water levels rising around the world, and the Middle East drying up, one can only wonder how many people in these areas will decide to migrate to other countries. I think it's very possible we'll see some kind of mass migration from MENA countries to Western countries if the water crisis doesn't get solved. And i'm not talking about the kind of mass migration we've seen in the recent years, but on a much larger scale.