On September 8 of that year, support beams snapped and caused a concrete slab to fall onto an exterior walkway. No one was injured, but the Expos had to move their final 13 home games of that season to the opponents' cities. The Expos hinted that the 1992 season was at risk unless the stadium was certified safe. In early November, engineers found the stadium was structurally sound. However, it took longer to certify the roof as safe because it had been badly ripped in a June windstorm. For the 1992 season, it was decided to keep the roof closed at all times. The Kevlar roof was removed in May 1998, making the stadium open-air for the 1998 season. Later in 1998, a $26 million non-retractable opaque blue roof was installed.