A time-series of total fires or acres burned is difficult. Fire fighting techniques, technology have advanced a lot. Not to mention most starts are human related. The way to look at is the fuels: ERCs, BIs, 1000-hours etc.
Increasing evaporative demand, migrating snowpack, pest proliferation, tree mortality all are enhanced by warming. Camp Fire had fuel levels never before seen this late in the season. Regardless of if PG&E’s line started it, AGW has had a significant effect on fuels.