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Authorities provided updates on the collapse of a 12-story Florida condominium building in a press conference Wednesday evening. 

Authorities addressed the progress of search-and-rescue efforts at the site of the collapse of the Champlain Towers South in Surfside, a town just north of Miami. Miami-Dade County Mayor Daniella Levine Cava said there are 18 confirmed deaths and 145 people unaccounted for. 

Authorities are also discussed contingency plans for severe weather, such as tropical hurricanes, that could further stretch responders' painstaking search efforts. 

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