kinda said:
Would the south hemisphere remain unfrozen?
Well, I wouldn't lose a lot of sleep over the science in the movie. But the premise is interesting to play with. I just had a look at the movie's web site and altho it's very difficult to navigate, it seems that as a rough rule of thumb everything above the Tropic of Cancer was snap frozen. So there was no evacutation. Most of North America is gone. Say, Florida, So Cal and some of the hotter southern states were just warm enough to get their peope out. Europe, Russia and China are ex-parrots. Everyone there is now a popsicle. Japan likewise.
Interestingly, significant elements of the US Armed Forces would survive because they are posted to – God help this pun – hot spots. The Middle East, SE Asia, Guam, Hawaii and so.
North East Asia appears to be frozen toast too. Climatically South America, Africa and Mexico are fine and dandy, except for all of the heavily armed gringos knocking at the door. Australia and New Zealand escape largely unscathed, except for greatly increased storm activity in Australia's northern latitudes. Most of India survives.
So, a sticky situation. I'd agree that the geopolitics would very quickly regress to a Hobbesian state, a war of all against all. As a matter of demographic survival I'd lay money on the barrel head that Australian and New Zealand would work out some loose federation deal and offer sanctuary to millions of American refugees, along with surviving elements of the US Armed Forces. I suspect however there would be some ugly selection criteria involved in who got a ticket Downunder.
I can see a huge armed enclave of American refugees taking over large swathes of Mexico. Like all refugees they would be ghettoized, but unlike all refugees they wouldn't be powerless. I guess the international financial system would freeze up completely (har-har), but there are enough National Guard and regular military forces stationed in US South to have their way in Mexico. So money wouldn't save them, but bullets might.
The Middle East, a blood bath. Without the US to back Isreal, expect a war. Probably nuclear.
India would shape up as the new global hyperpower, except she might not be able to feed her masses, which could lead quickly to military adventurism.(Hence the interest of Aust and NZ in securing both US forces and population flows.) The rice fields of South East Asia, would beckon. Indonesia, the Phillipines and Malayasia seem to escape refrigeration, but whether their political systems are robust enough to survive is questionable. Expect civil war in the first two, and a fascist state in Malaysia.
I imagine half a million or so Americans might be resettled into Hawaii, but food resources would be very scarce.
Man, I'm loving this so much I think I might write a new book!