To WilliamOK,
Yes it is true that bush fire is a natural occurence in Australia but as 404 Titan has pointed out if lives are at risk and property especially yours then I'm sure you would do anything possible to save them.
I'm sure as well that the 747 tanker would be a heck of a lot more effective than what they use now.
We also do our best to develop vacines and medical procedures to prevent or cure normally occuring disease .
Do you think we should give them a miss as well because they are not natural but man made