In Australia, summer is usually humid and rainy while being fiendishly hot. This year, due to the undeniable scientific fact of climate change, it is simply dry and fiendishly hot, which leads to fires.
While a very small percentage of these are indeed lit by arsonists, the vast majority have begun because of changes in our climate.
Eucalyptus trees, for example, are horrendously flammable, because they are filled with oil, more or less. The hotter they get, the more likely they are to literally explode. And when one eucalypt goes up in flames, the rest follow.
Fires are also started by 'dry storms' -- storms that produce lightning but very little to no rain. The vegetation is dry and brittle from the drought, so when lightning hits...flames again.
Because of climate change, this has all been exascerbated tenfold. This is unprecendented.
This is absolute hell on earth.