The freakiest thing about this flood was the flash flood in Toowoomba, that city is more than 800m above sea level and 3 months ago they were trucking water in because the dam was dry. We had a very wet December (apparently so did they) but a flash flood on a mountain top is just plain odd.

The flood in Brisbane is less odd but it's been more than 35 years since the last big one and they built a huge dam on the Brisbane river to mitigate floods. Two years ago that dam was at 16% capacity, last month it was 100% (not over flowing just at the maximum planned level, it overflows at about 280%) in less than 5 days it rose from 100 to 180%.

I have no idea how much water that it, but safe to say... a lot