Toronto, New York and Washington top list of most polluted cities as wildfires burn

Core point

Cities in north-eastern Canada and the US are experiencing severe air quality issues due to wildfires. Toronto, New York, and Washington DC have recorded some of the worst air quality levels globally, prompting health warnings. The wildfires have led to evacuations and significant destruction, particularly in the Namaygoosisagagun First Nation. Canadian officials reported that fire activity in Ontario is beginning to ease, but the situation remains critical.