The Day After Tomorrow

The global-warming-induced storms destroy most of North America, and the President finally gives the order to evacuate south to Mexico. The President dies after being the last to leave the White House. Dr. Jack Hall (Dennis Quaid) and fellow scientist Jason Evans (Dash Mihok) reach New York to find his Jack's Sam (Jake Gyllenhall) safe with friends in the public library. They are rescued to be reunited with family. The storm stops just before reaching Mexico, and the new President announces that people have learned their lessons about tampering with nature.
Thanks, Dan!