A volcano erupts in downtown Los Angeles and a city official and a seismologist try to stop its inevitable flow through the city.

Robin Monroe, a New York magazine editor, and the gruff pilot Quinn Harris must put aside their mutual dislike if they are to survive after crash landing on a deserted South Seas island.

Four families in a Heartland town are tested in a single day when a tornado hits, forcing paths to cross and redefining the meaning of survival.