[Baz]

Just about very single ocean front codo building here has gone through restoration due to corrosion of the rebar inside the concrete from the sea air.

I don't know if this was a factor in this incident. But in looking at the photos - those balconies are the parts that are typically affected.

There's usually plenty of advanced warning signs so a condo building doesn't just fall apart before restoration work can be arranged.

Article mentioned roof work was being done when this happened.

No idea here. Guess we'll find out......