I live in Queensland (gets quite hot here in summer), I had a pair of blundstones once and would not recomend them, they were s#!t, but not because of the heat, they were uncomfortable and didn't last. I now have Rossi boots I wear to work, and I can't speak highly enough about them, I have had them for about 9 months now, I spent 3 months working on Lady Elliot Island, which is a proving ground for anything, nothing lasts out there, most peoples boots were dead in 2 months at the most, mine are still as good as when I bought them, if I had to recomend an Aussie made boot, it would be Rossi's, but I don't know if you have them over there.