The news is wise enough not to make a huge deal of it, but a non-trivial number of the last bunch of fires were determined to be arson. It's hardly even a stretch to imagine that the arsonists might not have been just random folk who thought it'd be really cool to start a fire.

Then again, when a casual arsonist can set significant fractions of a state or even country on fire, and there's millions of people living in the area, and when "pyromania" is sufficiently common enough that it's got it's own entry in the DSM [1] (with estimated incidence at 1.13% (!)), it probably counts as an unnecessary complication to the explanation. There's no way 1.13% of "millions of people" can be stopped. The only solution is to not let the powder keg be created in the first place.

[1]: https://www.theravive.com/therapedia/pyromania-dsm--5-312.33...