Storm Shelters br Owner of Great American Storm Shelters explains how a storm shelter will save your life. Call for information 1-800-915-7233br br Our storm shelters have been tested by the Wind Science and Engineering Research Center at Texas Tech University to withstand debris from an EF-5 tornado. All of our storm shelters carry an engineer's seal and come with a lifetime warranty. We service residents of Alabama, Georgia, Mississippi, and Tennessee.