Heartbreaking new video footage shows water gushing into the garage of the Florida condominium building moments before it tragically collapsed last week.

The footage was reportedly shot by a tourist and it shows water pouring down underneath Champlain Tower South in Surfside on Thursday shortly before the building fell down, according to a report by ABC affiliate WLS-TV.

Adrianna Sarmiento told the station she and her husband were swimming in the pool at the nearby Bluegreen Vacations Solara Surfside Resort while on vacation when they heard a loud noise coming from the building. They went to investigate the noise and began shooting the video on their cell phone, showing the time to be 1:18 a.m.

Authorities have said that the building collapsed around the time of 1:25 a.m.

The video is broken up by the wind before the collapse but when it resumes, the building is in ruins, and rubble and debris are seen to have littered the ground around it.

In the distance, emergency lights can be seen as a man's voice is heard saying, "oh my God", while Sarmiento weeps with shock and upset.

Officials said on Wednesday that sixteen people are now confirmed dead from the building collapse and 147 remain unaccounted for. Rescue workers continue to climb through the pile in a desperate search for bodies or possible survivors.

The twelve-story beachfront condo in Miami-Dade County was built in 1981 and has been sinking into the ground at a rate of 2 millimeters a year since the 1990s according to a 2020 study conducted by Shimon Wdowinski, a professor at Florida International University.

The reason for the partial collapse of the building is still uncertain and authorities are still unsure how many bodies are yet to be uncovered, or how many are still waiting to be rescued, but unfortunately, the death toll is rising since the last report.

David Begnaud wrote a tweet sending his prayers to all who might be suffering amid the tragedy:

"Going to sleep in Miami tonight thinking about the people missing and feared dead in the condo collapse. You go to bed & the building collapses. God. I just can't wrap my head around it. If you pray, please pray. Many families would appreciate it."

He also shared another tweet claiming that "seventy-five days before the tower collapsed in the FL the condominium Association President (who survived the collapse) told residents: damage to the building's basement garage had 'gotten significantly worse'...&deterioration of building's concrete was 'accelerating'".

State Attorney Katherine Fernandez Rundle said she will pursue a grand jury investigation to examine factors and decisions that led to the collapse.

An investigation is to commence after it was revealed that the building had been collapsing for decades, according to researchers.

Our hearts go out to those who've lost loved ones and livelihoods after this tragic incident.