Canada fires prompt US air quality alerts as smoke blankets major cities

Over 800 wildfires are raging in Canada, leading to air quality alerts across several US states. Smoke has affected major cities, including Detroit, New York, and Toronto, prompting officials to cancel outdoor events and advise residents to stay indoors.

The fires have forced evacuations in some First Nations communities, with one chief reporting, "her community has been 'burnt to ashes'".

The hazardous air quality has been termed "very unhealthy" in parts of New York and "the worst in the world" in Detroit.

Both Canadian and US officials are under pressure to manage the crisis, as air quality remains a significant concern.