While there clearly are more localized DEW weapons being used, I think the fires are initially being started by a weaponization of a Nikola Tesla discovery, later referred to as the Zenneck Surface Wave.
One video showed bushes burned only at the ground with half its brush tilted horizontally. The satellite imagery showed the initial smoke from the Paradise fire moving at a right angle to the prevailing winds. This must be a result of ionized particles being repelled energetically.
Satellite imagery also showed a high-energy vertical blast at the outset of the fire and sparkles around the growing flamefront, which as POTUS pointed out is growing very fast. I don't know if aircraft-mounted DEWS could produce those effects.
I bet that by looking at that particulate vector (triangulating similar info from other fires), and the pattern of anomalous damage, we could find the source - probably a Wardenclyffe looking tower. Same was done for 9/11, tracing the energy beam to Brookhaven National Labs northeast of NYC.
Check out this company planning to deliver power wirelessly using the ZSW technology. Check out the retired Air Force leadership as well. CTO invented Guided Microwave Spectrometry. - http://vizivtechnologies.com/about-us/
Gotta go, workfagging and past my bedtime!