Canadian wildfire smoke brings dangerously high pollution to US cities
Summary
Smoke from many Canadian wildfires has caused very bad air pollution in several large U.S. cities, including Chicago, Detroit, and New York. Officials have warned people to stay indoors, wear masks, and the situation is expected to last for several days.Key Facts
- Over 130 wildfires are active in northwestern Ontario, Canada, with at least 60 out of control.
- Smoke from these fires has spread to U.S. cities near the Canadian border and the Northeast.
- Chicago and Detroit were among the most polluted cities globally on July 16, 2026.
- New York’s air quality reached levels harmful to everyone, prompting health warnings.
- Masks and cooling centers were offered to help people cope with unhealthy air and heat.
- The air quality index in parts of the Midwest exceeded 700, which is considered "hazardous."
- Outdoor events, including a Major League Soccer game in Chicago, were postponed due to the pollution.
- Authorities expect the smoke to remain a problem for at least two more days and possibly longer.
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