Fan CastingThe Day After Tomorrow

Jack Hall, an American paleoclimatologist, and his colleagues Frank and Jason, drill for ice-core samples in the Larsen Ice Shelf for the NOAA, when the shelf breaks apart. Jack warns of impending global warming at a UN conference in New Delhi, but US Vice President Raymond Becker dismisses his concerns. Professor Terry Rapson of the Hedland Centre in Scotland befriends Jack over his views of an inevitable climate shift. When several buoys in the Atlantic Ocean show a severe ocean temperature drop, Rapson concludes Jack's theories are correct. Jack's and Rapson's teams, along with NASA meteorologist Janet Tokada, build a forecast model based on Jack's research. A massive storm system develops in the northern hemisphere, splitting into three gigantic hurricane-like superstorms above Canada, Scotland, and Siberia. The storms pull frozen air from the upper troposphere into their center, flash-freezing anything caught in their eyes with temperatures below −150 degrees Fahrenheit (-101 degrees Celsius). Meanwhile, the weather worsens across the world; Tokyo is struck by a giant hail storm, sea levels in Nova Scotia rise 25 feet (7 meters) in seconds, and Los Angeles is devastated by a tornado outbreak. Following this, President Blake issues an executive order for the FAA to ground all air traffic across the country. In New York, Jack's son Sam, and his friends Brian Parks and Laura Chapman participate in an academic decathlon, where they meet new friend JD. New York is soon caught in the North American storm and the weather becomes progressively more violent; resulting in a massive wave flooding Manhattan. This forces Sam's group to seek shelter at the New York Public Library, but not before Laura accidentally cuts her leg. While cellphone communications are down, Sam is able to contact Jack and his mother Lucy, a doctor; Jack advises him to stay inside and promises to rescue him. Rapson and his team perish in the European storm, while Lucy remains in a hospital caring for bed-ridden children, waiting for the authorities. Upon Jack's suggestion, Blake orders the southern states to be evacuated into Mexico, the northern half doomed to be hit by the superstorm. With the storm having now reached Washington, Blake perishes after his motorcade is caught in it, making Becker the new President. Jack, Jason, and Frank make their way to New York against all odds. In Pennsylvania, Frank falls through the skylight of a mall, cutting his rope to prevent his friends from falling in after him. In the library, most survivors decide to head south once the floodwater outside freezes in spite of Sam's warnings, and are later found frozen solid by Jack and Jason; only a few survivors end up taking heed of Sam's advice and burn books to stay warm as the temperatures plunge. Laura develops blood poisoning from her injury, whereupon Sam, Brian, and JD scour a Russian cargo vessel that had drifted into the city for penicillin, fending off a pack of wolves which escaped from Central Park Zoo. The eye of the North American storm arrives, freezing Manhattan solid, but Sam's group make it inside just in time. Likewise, Jack and Jason take shelter in an abandoned fast food restaurant. Days later, the superstorms dissipate. Jack and Jason successfully reach the library, finding Sam's group alive. Becker, in his first address as President, apologises on television for his ignorance, vowing to send helicopters to rescue survivors in the northern states. Jack and Sam's group are picked up in Manhattan, where many people have survived. On the International Space Station, astronauts look down in awe at the frozen Earth, now free of pollution.