Here is the Nature Communications article.
https://www.nature.com/articles/s41467-020-19183-0
Before we get too excited: "In particular, we deliver light-absorbing graphene particles (100–1000 μm in size) to the space between the electrodes using a slowly diverging laser vortex beam (see “Methods” section) propagating through a round hole in the first electrode."
This is far from self contained. I know that in the past people seeded clouds [0] to get rain but this is a lot of extra work that's needed. At that point it may be still easier to use the high power laser and guide the discharge. Saying this technology can help reduce wild fires is a bit premature but I wish them all the best of luck.
[0] https://en.wikipedia.org/wiki/Cloud_seeding