Pay attention to local air quality reports and public health messages.
Refer to visibility guides if they are available. Not every community has a monitor that measures the particles in the air. In the Western part of the United States, some communities have guidelines to help people estimate the Air Quality Index (AQI) based on how far they can see.
If you are advised to stay indoors, keep indoor air as clean as possible. Keep windows and doors closed unless it is extremely hot outside. Run an air conditioner if you have one, but keep the fresh air intake closed and the filter clean to prevent outdoor smoke from getting inside. Running a high-efficiency particulate air (HEPA) filter or an electrostatic precipitator (ESP) can also help you keep your indoor air clean. If you do not have an air conditioner and it is too warm to stay inside with the windows closed, seek shelter elsewhere.