If you want to tell people that, you ought to be sure that global warming actually has a significant impact.
I don't know about Australia, but I know that the vast majority of fires in the US are caused directly by humans. Something like 90+% of them are started artificially(not by lightning strikes or something along those lines), which is kinda sad.
But is climate change necessarily making the situation worse? How great would the Australia fires be if this was the year 2000?
Doomsday for lots of Kangeroos and other animals, no wolves in Oz though.