Canada

If you are reading this, and you live in an area that got hit with forest fire smoke last year, prepare now and get supplies to build a DIY HEPA filter setup for your home with guides like this:

https://deohs.washington.edu/edge/blog/how-make-box-fan-filter-clean-indoor-air-smoke

I’ve already got my set up ready because I had to last year.

You've inspired me to make one for my parents. It really is cheap and easy to do, you just need the foresight to do it because box fans get hard to find in the summer.