odd this was never mentioned as to why the delay...
The last corner grandstand at the Interlagos circuit suffered significant damage as its roof collapsed under harsh weather conditions, leading to debris on the track.
Formula 1 photographer Andy Hone reported the incident, noting that while the structural damage was considerable, there were fortunately no injuries.
The start of the qualifying session was delayed as the track was cleared of debris, and conditions subsequently led to a red flag during Q3, finalizing the grid positions prematurely.
Thanks for the new thread and the interesting story about the grandstand roof.