Wildfires in Canada have burnt over 64,000 miles. Some estimates even say the fires could continue to burn through winter.

Source: https://www.reuters.com/business/environment/canadian-wildfires-could-keep-burning-through-winter-minister-2023-09-07/

PM2.5 particles are particles that are so small they can be breathed in. They have been known to lead to adverse effects like heart disease, asthma, and more.

Source: https://www.health.ny.gov/environmental/indoors/air/pmq_a.htm#:~:text=Fine%20particles%20in%20the%20air,nose%2C%20and%20shortness%20of%20breath.