Keep extra filter replacements for your HVAC system & air purifiers
Check your HVAC system to see if it has a way to prevent outside air from being sucked in. How to do this varies by manufacturer.
If smoke gets into your house, make a homemade filter with a box fan and an HVAC air filter. Use a bungee cord to strap them together.
Keep a garden hose hooked up outside ready to be used immediately if a grass or mulch fire starts by your house. (This actually happened at houses in our neighborhood in 2020 and 2024)