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Climatological disruption of gargantuan proportions is ravaging Earth and people are freaking out. Millions of terrified survivors are surging South. But Professor Adrian Hall (Dennis Quaid), a brilliant paleoclimatologist, is going in the other direction. Hall believes that his son, Sam (Jake Gyllenhaal), may still be alive in the frozen wasteland that was once New York City.
Devastating tornados rip Los Angeles, a massive snowstorm pounds New Delhi; hail the size of grapefruit batters Tokyo; and in New York City, the temperature swings from sweltering to freezing in one day.