The massive Camp fire in Butte County in northern California (currently 70,000 acres) that sprung up yesterday has made air quality in Northern Calif very poor. It's something like 150 miles from San Francisco but yesterday areas down to Palo Alto on the Peninsula were being affected. Today the particulate matter has traveled further south into the south SF Bay area and when I opened our front door was met by the odor and general yellowish cloud of fire smoke in the air. Just now I think I'm starting to discern it in our house with all the doors and windows closed, actually pretty strongly and really have no where else to go. Not much wind to blow it out to the ocean and it must be drifting south. I went out for coffee mid-morning and on the radio they were saying that some parts (forgot where) were measured at 4x the amount of Particulate Matter in the smog in Beijing. Very unhealthy and places have closed down to keep people reduce people's exposure to inhaling the smoke the less they had to be out. Pretty much stay inside is the advice. This is also very scary for all those people directly affected by it. One whole town has burned down from what I heard earlier. People have been found dead in their cars as it moved so fast. This fire sitation did have me conscious as to how well the Model 3's air filter works in my new car. Elon said they weren't bio-weapon defense level but were the second highest quality HEPA filters in cars today. I can see from when I went out this a.m. that I didn't seem to detect the smell of smoke while in the car (on recirc) but could when I rolled down the window at the drive-thru and later when I went to come back to the house. So I came away with a positive feeling about it's effectiveness. With so many Model 3 driving around in Northern California right now in all this smoke, was curious how others would rate their car's filtering system. I understand there is also another major wildfire in Southern California in the Ventura area again so if you are driving around in that area, feel free to comment here as well.