Tornado Alley

A multiple-vortex tornado that stuck Hattieburg, Miss., on Feb. 10, 2013, is recalled in the season 2 premiere.

A look at an EF4 tornado that stuck the small town of Henryville, Ind., on March 2,2012.

An EF4 multiple-vortex tornado that stuck Tuscaloosa, Ala., on April 27, 2011 is recalled

An EF4 tornado that stuck Washington, Ill., on Nov 17, 2013, is recalled

A shelter provides momentary refuge from a storm; a grandmother saves herself and three toddlers when she takes cover in a bathtub; an a man feels guilty after turning his back on a woman caught outside

A dingle mom and her two sons survive getting sucked into the vortex of a tornado; and a Mississippi family learns that survival sometimes means needing help. Also: disaster preparation in a Texas community

A woman risks everything to save her two children; a family tries to save their neighbors; and a woman and her daughter discover that there is more to survival then enduring a terrifying ordeal

Strangers work together to survive a tornado; storm chasers rescue a family; friends help a family trapped inside their home; and a police officer saves a toddler injured during a storm

Strangers depend on one another to survive; and a family discovers a hard part of survival: separation

A family decides not to go to the town shelter; a Nigerian immigrant comes to terms with losing his wife; and a business trip on the day of the tornado almost results in a tragedy

Rescue workers save the daughter of a woman who lost her mother to a tornado three years earlier; a girl finds courage she didn't know she had; and a member of a campus ministry and a storm chaser join forces to save a storm victim

Strangers take shelter in a frozen yogurt store when a tornado hits Joplin, MO.; a family needs the help of neighbors after winds devastate their town; and parents use a cell phone to save their life of their daughter during a storm.