To avoid breathing wildfire smoke, it's important to have the right gear. Dust masks, bandanas and damp pieces of cloth won't adequately protect you from inhaling fine particulate matter like PM2.5.

Patients with Chronic Illnesses and the Elderly Urged to Wear 'Yellow Dust Masks' The phrase "clear autumn sky" is quickly becoming a thing of the past. This is due to the worsening "smog from China." ...