More than 800 Canadian wildfires burning as air quality alerts extend to US

July 16, 2026

Canada is experiencing over 800 active wildfires, with the majority burning out of control and generating dangerous smoke that has spread across the Canadian-US border. Air quality has deteriorated to hazardous levels in several northern US states, including Michigan, Minnesota, and parts of the Great Lakes and Northeast regions, prompting authorities to recommend people remain indoors. The worst-affected cities globally include Detroit, Minneapolis, and Toronto, according to international air quality monitoring.

Who is affected

Residents of northern US states including Michigan, Minneapolis, and Minnesota
People in the Upper Midwest, Great Lakes region, and US Northeast
Residents of Thunder Bay and Toronto in Ontario, Canada
Communities in western Ontario and Quebec
Attendees and organizers of Sunday's World Cup final in New Jersey
Freight train workers who were trapped in Ontario near Armstrong
Canadian National Rail operations in the region

What action is being taken

More than 800 wildfires are actively burning across Canada
US Air Quality Index program is issuing hazardous air quality warnings
Authorities are recommending people stay indoors
Canadian National Rail has temporarily suspended operations in the affected region
The US national weather service (NOAA) is providing updates and alerts

Why it matters

This event represents a significant environmental and public health crisis affecting millions of people across Canada and the northern United States. The hazardous air quality poses serious respiratory risks, particularly for vulnerable populations, and the designation of cities like Detroit as having the worst air quality in the world underscores the severity of the situation. The widespread nature of the fires, with the vast majority burning out of control, demonstrates the scale of the wildfire challenge and its cross-border impacts, potentially disrupting major international events and daily life across a large geographic area.

What's next

Widespread thunderstorms are expected in Ontario over the next few days, though rain may not significantly impact the fires
Northwesterly winds will continue blowing smoke into northern US states through the weekend
A wind direction change by Monday is expected to steer smoke across Quebec and improve air quality in the southern US
There are concerns smoke will drift into New Jersey where the World Cup final is scheduled for Sunday

Read full article from source: BBC