Structural causes behind Miami building collapse

A residential building in Surfside, Florida, collapsed, leaving 150 people unaccounted for. The cause is unknown, but a 2018 report highlighted structural issues, including water damage and poor repairs. A contractor observed significant water damage before the collapse. The building had been sinking since the 1990s, but experts are cautious about linking this to the collapse. An eyewitness reported a sinkhole forming before the incident, and experts suggest a structural failure beneath the pool deck.

How much had the building been sinking per year in the 1990s according to the Florida International University study?

What did the woman inside the building report seeing moments before the collapse?