@margo,
Yes, I saw the NSW reports on the news, margo. Wow! Wet!
I'm really glad you missed out on having your home flooded. Not a nice experience!
I was home during the last downpour here & rushed around the place strategically placing my 8 (used for grey water) buckets around the place. And they were all filled!
If I came into a surprise windfall, I think I'd spend the $$$$ on installing as many of those new fang-dangled tanks (which fit into odd spaces) as possible. All that precious water disappearing down the street!