I wouldn't be at all surprised.
There are literally what, hundreds or even thousands of mis-guided idiots claiming antifa connections?
If antifa sent people out to light fires, and I believe it's probable, I think they would be very successful doing it. Now if they tried it in western Oregon in the winter, I bet they couldn't light a fire with a nuclear warhead, but now, with these conditions, yeah, they could light hundreds of fires in no time.