Centers on the events leading up to the cataclysmic 1980 eruption of Mount St. Helens in Washington, with the story beginning on the day volcanic activity started on March 20, 1980, and ending on the day of the eruption, May 18, 1980.
Art Carney
as Harry Truman
David Huffman
as David Jackson
Cassie Yates
as Linda Steele
Albert Salmi
as Clyde Whittaker
Ron O'Neal
as Otis Kaylor
Tim Thomerson
as Sheriff Wayne Temple
Bill McKinney
as Kilpatrick
Redmond Gleeson
as Hendricks
Nehemiah Persoff
as Mr. Ellison
Brendan Burns
as David Crockett
Henry Darrow
as Lloyd Wagner
Danny Chambers
as Col. Arnholt
