Canada Day fireworks cancelled over air quality fears
Concerns over air pollution and starting further fires mean some displays have been called off.
1970-01-01 08:00
How bad is repeat exposure to wildfire smoke?
Over time, exposure stresses the body, damaging the heart and lungs, and can impair cognitive function.
1970-01-01 08:00
Smoke and heat warnings affect more than 170m in US
Scorching temperatures are expected in the US west as the East Coast grapples with wildfire smoke.
1970-01-01 08:00
Canada wildfires spark air quality alerts in Chicago and Milwaukee
Smoke drifting south causes a haze over parts of Ontario as well US cities like Chicago and Milwaukee.
1970-01-01 08:00
Air quality: Surreal skies grip New Yorkers - in pictures
The sight of one the most famous skylines in the world shrouded in an orange hue has made headlines around the globe.
1970-01-01 08:00