Officials are considering demolishing the rest of the Champlain Towers South as operations continue in sections that crumbled to the ground a week ago, Miami-Dade County Mayor Daniella Levine Cava said Thursday evening. Work on the debris was halted for much of the day as engineers assessed the structure still standing. Levine Cava told reporters at an evening news conference the operation resumed about 4:45 p.m. "Given our ongoing safety concerns about the integrity of the building we're continuing to restrict access to the collapse zone," she said. Engineers are conducting ongoing testing and evaluations of the site to expand the search into more areas as it becomes safe to do so, she said. Miami-Dade Fire Chief Alan Cominsky said crews were working in three of nine grids.