The partially collapsed Florida condo building, which has left at least four dead and 159 people missing, was flagged as having “major structural damage” in 2018, according to reports. A lack of proper drainage on the pool deck of Champlain Towers South condo, which sits above the building’s parking garage, was the source of the “main issue,” wrote engineer Frank Morabito, according to the Miami Herald. Years of standing water had seriously damaged the concrete structural slabs below the deck, a problem Morabito warned would be “extremely expensive” to fix. “Failure to replace waterproofing in the near future will cause...