A reputable US news outlet came out with an article that these fires in the last 2 days have released as much small particulate matter as all the cars would in California in a year.   It's a lot.  What's the solution?  Not sure, if there is a way to limit forest fires other than not having trees.  However, we should acknowledge that there is a constant cycle going on here.  Trees grow from water and sun, and then they die eventually, from sun and drought, and eventually, there is a lot of fuel for these fires to burn from lighting strikes, and man made accidents.  Once all the tress burn down, the forest comes back eventually.