Diatomaceous earth ( food grade ) is also good to use especially in places like under fridges and microwave ovens etc. It punches holes in their exoskeletons and dries them out. Works for cockroaches too. They can't build up immunity to it.
I live in Forster. I am safe but my back yard is flooded. This happens when we have a lot of rain but it runs away quickly when the rain stops. We are isolated from the north but traffic can still access from the south. Really feeling sad for Taree and Wingham and other surrounding towns and...