underfire, I guess they didn't land at the original destination because there was a 737 in the mud at the end of runway 27 and presumably they couldn't use 14/32 for whatever reason?
14/32 was unusable, heavy rain and tail wind. AMD was full, GOI too. HYD was filling up fast, MCT & DEL only other alternative. Complete closure of BOM certainly overloaded ATC.
From all of the posts, looks there was a lot going on, which is not evident from the OP news brief.
why hold for an hour before deciding to divert....nothing gets cleared that fast.
as noted everything was filling up, so the 'news' of calling mayday 4 times enroute for clearance seems a bit like, well...