This documentary, made by the Federal Emergency Management Agency, tells the story of April 10, 1979, the day a F4 tornado a mile and a half wide hit Wichita Falls, Texas, known as Terrible Tuesday. In its wake, 46 people died, 1,700 were injured, and 5,000 homes were destroyed, leaving almost 25,000 residents homeless. This film documents survivors’ stories, describes the city’s disaster plan, examines the National Weather Service’s role in emergency response, and explains to viewers how to most safely behave in the event of a tornado.