It’s both, per my read. Don’t forget they have Eucalyptus trees, which, if you’re not familiar, shed very thin layers of “bark” (it’s not coarse bark like oak/walnut trees, it’s like your skin, it sheds in thin layers and also hangs off the trees) in prodigious quantities; this would be like construction-paper in terms of how quickly even a tiny spark could catch it afire....and then the trees themselves are very gummy and flammable, much more so than oak, elm, etc; So, if you had a bunch of scrub brush, 120 degrees, and all the detritus from these trees, OMG, it will catch and burn like mad.
Been told that Eucalyptus can spark up to 7 miles...makes it a hard fuel to deal with. And they tend to get hollowed out with age and blow up real good in wild land fires...