And what is the possible outcome from this discussion? More wild guessing and FUD.
The rescue folks already have their rules and procedures for dealing with storms. This is not some 'new discovery' to them.
Disney would also already have a plan in place for 'what to do if the line can not be emptied' - because, this too is not some 'new discovery' to them.
The answers always boil down to the same outcomes... Disney will conclude it is safe to run the line, or they will not, and when appropriate, evacs will happen.
There are no other outcomes... You either get evac'd, or you ride the thing. There is no magic third, fourth, or whatever possible outcome.
If you have to wait.. you wait.