We should have a fleet of water bombers in each state ready.
Then a fleet a big sponges when it floods next June
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I think we need a national fleet, and a some sort of national professional fire fighting force. Able to be deployed around the country as and when required. I think if every state decided to buy and maintain their own fleet there would be a lot of duplication of resources. Not an adjunct of the defence forces either but a stand alone force. Highly trained personnel, who accept deployment anywhere around the country for short spells.
They could also do floods and tropical cyclones and other natural disasters.
They would be employed full time, especially over the summer months. Over winter we could find some other useful work for them to do, maybe they could do hazard reduction burns or stuff like that.
I think the days of relying on local volunteers, and leasing aircraft on an ad hoc basis has had its day.