Nino has left the building and El Nina seems to have settled in. Sydney has had drought for the past eight years, and it may be breaking. These are some pics from about 10am last Sunday - the front of my house. I live on a flood plain, but this is purely stormwater not escaping; not a river breaking it's banks.. I'd hate to know the outcome if the river floods and we get an extreme downpour. The house is about a metre above the road, but the shop next door is not.
After 15 minutes, the water dissipated.
Experimental "Rain Gardens" up the road had been installed to filter rainwater, and may have had an influence on the flash flood, but I doubt it. The drains below the rain gardens were overwhelmed (The Rain Gardens are meant to be a reticulation basin for plants to filter excess stromwater). I hope the gardens weren't the cause, as I support them. But if they are behind this, they need tweaking.