Jeezo Jim, that's a rather hectic list .... it's pretty obvious you are not employed by the Aussie tourism bureau nor your local chamber of commerce.
If I lived where you do, I'd be seriously considering a move to .... oh say, Antarctica perhaps, where you'd have none of those nasty concerns, but I don't suppose the terriers would do so good there either!?!?
Bushfire would be our main threat, we learnt five (5) years ago, it doesn't matter how good your bushfire emergency plans that you have in place are.....they go to sh!t in 10 minutes.