CaterpillarKing
Conqueror of Cacoons
Uh. I mean, that's remind me of "The Day After Tomorrow" where there are such a great natural "global" catastrophe on (basically) developed world which the USA migrate their citizen to Mexico and South America.
I don't sure if "them" in your post would mean "Germany + Britain + Scandinavia in particular" I want to say.
Well, to be honest, the world would be even more screwed than they made it out. Major food baskets like Central Asia, America, etc. were under ice in the alst shot of Earth. This means rampant famine and then, with all the refugees that would cause a hell of alot of strife because al the natives would be annoyed that so many foreigners are there and such. There is actually a very interesting video someone made of what would happen after the The Day After Tomorrow. Here