Major weather-related issues
Three years after the completion of the dome, the integrity of its roof became an issue. During a Falcons pre-season game in August 1995, a severe rainstorm caused water to pool up on the fabric, tearing part of the material and causing a section of the roof to fall into the stadium. The storm was intense enough that the roof panels could be seen moving during the game, and the water and roof material later fell with enough force to smash seats in the upper decks and knock holes in concrete floors. The collapse occurred after fans left the stadium, and no one was injured during the incident. The roof was eventually repaired in a way that prevented similar incidents from occurring in the future.
In the 2008 Atlanta tornado outbreak on March 14, 2008, during the 2008 SEC Men's Basketball Tournament, a tornado ripped two holes in the dome during the Alabama–Mississippi State quarterfinal game, which delayed the game for one hour and three minutes. The quarterfinal game to follow between the Kentucky Wildcats and Georgia Bulldogs was postponed to the following day. The resulting damage forced the rest of the tournament to be moved to the Alexander Memorial Coliseum at Georgia Tech.
http://en.wikipedia.org/wiki/Georgia_Dome