The guy then drastically restricts the dataset to only include rural weather stations, to less than a quarter of the original set of 100-year+ stations. At the least, there has to be some accounting of geograpical distribution in the analysis. The bigger question, though, is why would he remove the urban heat islands? Does their effect on the climate stop at the city limits, with a partition rising straight up into space? The whole concern about climate change is whether human activity (which certainly includes urban heat islands) will eventually lead to irreversible climate change that will have catastrophic effects.
(If folks feel "catastrophic" is alarmist, I suggest they Google "nine planetary boundaries", of which climate change is but one of the interdependent boundaries, for some truly alarming reading.)
Anyway, someone more knowledgeable than me can perhaps provide a better perspective on whether any climate-/weather-related elements have more of a role than temperature in affecting the initiation and spreading of forest fires. I'm particularly thinking of low humidity and drought caused by climate-change-induced storms, winds, etc. Are forest fires less likely to occur in cooler regions experiencing low humidity and drought?
Aah, starik36 and Excel Hero have gotten me interested in researching further; thank you, sincerely!