Over 738 wildfires are currently raging across Canada, with at least 201 uncontained. The resulting smoke is significantly impacting air quality across the Upper Midwest and Northeast US, placing at least eight states under air quality alerts. Detroit and Chicago rank among the world's worst cities for air quality due to the smoke. Authorities advise residents in affected areas to limit outdoor activities and keep windows closed.

Prepared by Olivia Bennett and reviewed by editorial team.