This is really interesting.
When looking at this through a short term lens (few decades), there is a developing upward trend and some of that may be linked to factual changes that have occurred: humidity, temperature, duration of seasons, winds? but a longer term perspective suggests that the main feature has been the build-up of flammable material, in part due to excessive and ill-timed human fire-suppression activity. It's like growing debt; it starts to hurt only when it burns.
i am aware of solid work that sort of saw this coming and that suggested to pre-emptively use active wildland fire combined with efficient control.
The key was the build-up of flammable material at the wildland-urban interface.
How did authorities react to this challenge? Policies (zoning, insurance subsidies etc) were put in place to encourage human presence and properties at the interface.

Denying climate change and ignoring previous clear scientific trends do not attract the same crowds but we should listen when nature speaks.