The torrential rain we got today surely will delay the underpass works for a bit. Its been years since I've seen rain this heavy here.Torrential rain is a rain that is very heavy and constant almost, what we are having in Adelaide at the moment is more like continual rain. That is rain that is not that heavy but is going on for hours or days even there is a big difference in the meanings. With torrential rain one would expect some flooding to take place, not as bad as what you get in Queensland but still bad enough to cause some disruption.
I have seen rain a lot heavier than what we are getting now in Adelaide on a number of occasions in the past.