A massive rescue effort is underway Friday morning in Surfside, Florida, in response to the partial building collapse that killed at least one and resulted in nearly 100 people being unaccounted for.

"The building is literally pancaked," Surfside Mayor Charles Burkett said in an interview. "It has gone down, and I mean there’s just feet in between stories where there were 10 feet. That is heartbreaking because it doesn’t mean to me that we’re gonna be as successful as we would want to be to find people alive."

The Miami-Dade Fire Rescue took to Twitter to post footage of rescuers working in the basement parking garage at the Champlain Towers. The crew is standing in knee-high water using a power drill to break through a wall. The ceiling appears to be folded in and is being supported by lifts, which underscored the risk that these rescue teams face while trying to find survivors.

"Firefighters continue working on locating possible victims while dealing with heavy damage and changing conditions in the parking garage," the tweet read.