SURFSIDE, Fla. – Officials in Florida halted the search for survivors in the rubble of the Champlain Tower South building early Thursday due to concerns over the remaining building’s stability, interim Miami-Dade Fire Rescue Chief Alan Cominsky said.
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Crews have been working through inclement weather, fire within the debris and other conditions which Cominsky described as “very, very unsafe” since the 12-story condo building partially collapsed early on the morning of June 24. Around 2:10 a.m. Thursday, authorities halted work after officials learned a crack that was being monitored had begun to shift.
“The stop in operations was based on the subject matter (expertise) of several on-site structural engineers,” Cominsky said.
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The fire chief said authorities couldn’t “pinpoint (the cause of the issues) to one specific incident.” Among other concerns, he said officials noted 6 to 12 inches of movement in “a large column hanging from the structure” which could damage support columns keeping the remaining building standing if it falls. He said authorities also found “slight movement in the concrete floor slabs on the south side of the structure … that could cause additional failure of the building.”
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As of Thursday morning, authorities were working with structural engineers to determine when it will be safe to resume the search through the rubble.
>> Related: Surfside condo collapse: Crew spoke to woman but couldn’t save her
“Right now, our primary focus, you know, obviously, is rescuing our victims as well as protecting our fire personnel that are life-saving as well,” Cominsky said. “So, we’ll evaluate, and my primary focus will be to see how we can get back out there and continue our search and rescue efforts.”
Gov. Ron DeSantis said crews have so far removed almost 1,400 tons of building material from the site.

President Joe Biden listens during a briefing with first responders and local officials in Miami Beach, Thursday, July 1, 2021, on the condo tower that collapsed in Surfside, Fla., last week. (AP Photo/Susan Walsh)

President Joe Biden meets with first responders in Miami Beach, Fla., Thursday, July 1, 2021, who were working on the condo tower that collapsed in Surfside, Fla., last week. (AP Photo/Susan Walsh)

A diagram is seen on the wall during the briefing with President Joe Biden and first responders and local officials during a briefing in Miami Beach, Fla., Thursday, July 1, 2021, on the condo tower that collapsed in Surfside, Fla., a week ago. (AP Photo/Susan Walsh)

President Joe Biden, center, listens as Incident Commander Mayor Daniella Levine Cava, right, speaks during a briefing with Florida Gov. Ron DeSantis, left, first responders and local officials in Miami Beach, Fla., Thursday, July 1, 2021, on the condo tower that collapsed in Surfside, Fla., last week. (AP Photo/Susan Walsh)

President Joe Biden meets with first responders in Miami Beach, Fla., Thursday, July 1, 2021, who were working on the condo tower that collapsed in Surfside, Fla., last week. (AP Photo/Susan Walsh)

Furniture and household items are perched in the remains of destroyed apartments, in the still standing section of the Champlain Towers South condo building on Thursday, July 1, 2021, in Surfside, Fla. Scores of people remain missing one week after the building partially collapsed.(AP Photo/Mark Humphrey)

Search and rescue personnel work atop the rubble at the Champlain Towers South condo building, where scores of people remain missing almost a week after it partially collapsed, Wednesday, June 30, 2021, in Surfside, Fla. (AP Photo/Lynne Sladky)

A man prays during a session of evening prayers, known as vespers, dedicated to people impacted by the partial collapse of the Champlain Towers South condo building, at St. Joseph’s Catholic Church on Wednesday, June 30, 2021, in Miami Beach, Fla. Church officials said between 18 and 22 of their parishioners were among the scores of people who have been missing since last Thursday’s collapse of the oceanfront condominium in adjacent Surfside. (AP Photo/Gerald Herbert)

Search and rescue personnel work atop the rubble at the Champlain Towers South condo building, where scores of people remain missing almost a week after it partially collapsed, Wednesday, June 30, 2021, in Surfside, Fla. (AP Photo/Lynne Sladky)

A dog working with search and rescue personnel barks to alert them after sniffing a spot atop the rubble at the Champlain Towers South condo building, where scores of people remain missing almost a week after it partially collapsed, Wednesday, June 30, 2021, in Surfside, Fla. (AP Photo/Gerald Herbert)

Workers peer up at the rubble pile at the partially collapsed Champlain Towers South condo building, ahead of a planned visit to the site by President Joe Biden, on Thursday, July 1, 2021, in Surfside, Fla. Search and rescue workers, who have had to contend with summer rainstorms, fires within the debris, and the threat of collapse from the still standing portion of the building, were not visible atop the rubble on Thursday morning, as scores of people remain missing one week after the collapse.(AP Photo/Mark Humphrey)

Leo Soto, whose high school friend Nicole Langesfeld is missing, along with her husband Luis Sadovnic, adjusts pictures at the makeshift memorial he began to the scores of people who were left missing after the Champlain Towers South condo building partially collapsed nearly a week ago, Wednesday, June 30, 2021, in Surfside, Fla.. (AP Photo/Gerald Herbert)

Workers peer up at the rubble pile at the partially collapsed Champlain Towers South condo building, ahead of a planned visit to the site by President Joe Biden, on Thursday, July 1, 2021, in Surfside, Fla. Search and rescue workers, who have had to contend with summer rainstorms, fires within the debris, and the threat of collapse from the still standing portion of the building, were not visible atop the rubble on Thursday morning, as scores of people remain missing one week after the collapse.(AP Photo/Mark Humphrey)

Search and rescue personnel work atop the rubble at the Champlain Towers South condo building, where scores of people remain missing almost a week after it partially collapsed, Wednesday, June 30, 2021, in Surfside, Fla. (AP Photo/Gerald Herbert)

Search and rescue personnel work atop the rubble at the Champlain Towers South condo building, where scores of people remain missing almost a week after it partially collapsed, Wednesday, June 30, 2021, in Surfside, Fla. (AP Photo/Lynne Sladky)

Rescue workers search in the rubble at the Champlain Towers South condominium, Wednesday, June 30, 2021, in the Surfside area of Miami. Many people are still unaccounted for after the building partially collapsed last Thursday. (AP Photo/Lynne Sladky)

Rescue workers search in the rubble at the Champlain Towers South condominium, Wednesday, June 30, 2021, in the Surfside area of Miami. Many people are still unaccounted for after the building partially collapsed last Thursday. (AP Photo/Lynne Sladky)

Rescue workers search in the rubble at the Champlain Towers South condominium, Wednesday, June 30, 2021, in the Surfside area of Miami. Many people are still unaccounted for after the building partially collapsed last Thursday. (AP Photo/Lynne Sladky)

Rescue workers search in the rubble at the Champlain Towers South condominium, Wednesday, June 30, 2021, in the Surfside area of Miami. Many people are still unaccounted for after the building partially collapsed last Thursday. (AP Photo/Lynne Sladky)

A Coast Guard boat patrols in front of the partially collapsed Champlain Towers South condo building, ahead of a planned visit to the site by President Joe Biden, on Thursday, July 1, 2021, in Surfside, Fla. Rescue efforts at the site of the partially collapsed condominium building were halted Thursday out of concern about the stability of the remaining structure, officials said.(AP Photo/Mark Humphrey)
Officials said that as of Thursday morning, 18 people were confirmed dead, and 145 others were unaccounted for in connection with the Champlain Towers South collapse. The deceased have been identified as Hilda Noriega, 92; Antonio Lozano, 83; Leon Oliwkowicz, 80; Gladys Lozano, 79; Christina Beatriz Elvira, 74; Frank Kleiman, 55; Stacie Dawn Fang, 54; Manuel LaFont, 54; Marcus Joseph Guara, 52; Michael Davis, 50; Anna Ortiz, 46; Anaely Rodriguez, 42; Luis Bermudez, 26; Andreas Giannitsopoulos, 21; Lucia Guara, 10; and Emma Guara, 4.
>> Related: Surfside condo collapse: Death toll rises to 18; 2 children identified
Authorities continue to investigate the cause of the collapse. A 2018 engineering report found that the building’s ground-floor pool deck was resting on a concrete slab that had “major structural damage” and needed extensive repairs. The report also found “abundant cracking” of concrete columns, beams and walls in the parking garage.
Just two months before the building came down, the president of its board wrote a letter to residents saying that structural problems identified in the 2018 inspection had “gotten significantly worse” and that major repairs would cost at least $15.5 million. With bids for the work still pending, the building suddenly collapsed last Thursday.
The Associated Press contributed to this report.