Wasn't the biggest Tillamook burn fueled in large part by logging slash piles?

I don't know about the Silverton fire.

I do know that in West Virginia, which was the epicenter of eastern forest logging a century ago, they had a tree-mend-us statewide fire in the 1920s that was also fueled by logging slash.

Yes, heat and dryness is not new, but converting old forests into more flammable tree farms is a newer problem.  Not that old forests cannot catch fire, but sometimes they are more resilient.