It’s a good time to put off that yard work and outdoor exercise. If you go out, consider wearing an N95 mask to reduce your exposure to pollutants.

Stay inside, keeping your doors, windows and fireplaces shut. It’s recommended that you run the air conditioning on a recirculation setting.

“If you have filters on your home HVAC system, you should make sure they’re up to date and high quality,” Hill said. “Some people, particularly those with underlying lung disease, or heart disease, should consider investing in in air purifiers for their homes.”

Read the whole article:

https://www.pbs.org/newshour/world/canada-wildfires-lead-to-air-quality-alerts-in-u-s-heres-how-to-stay-safe#:~:text=Stay%20inside%2C%20keeping%20your%20doors,high%20quality%2C%E2%80%9D%20Hill%20said.