Yep. The air quality issue does create anxiety for several relatives who live or visit Silicon Valley. There can be a few days a year that are intolerable for those with particular sensitivity and they must cancel their engagements and head out of town, or hole up in room with a quality purifier.
Can't really say that is a problem where I live, although recreational fires in fire pits are increasingly annoying as people increase outdoor gatherings in covid times.
Here's a couple of news clippings from different days in 2020
https://www.kron4.com/news/bay-area/one-year-ago-san-francis...
https://www.abc7news.com/amp/red-sunrise-bay-area-smoke-in-s...