Washington, New York breathe easier as smoke drifts further south

North American wildfires and air quality alerts in maps and images

Canada wildfires: Smog spreads south as east coast sees relief

Smoke from Canada's wildfires has reached as far as Norway

Amazon, Target modify deliveries in areas with poor air quality

Canada wildfires: Global help arrives as Quebec fights ‘historic’ fires

International help rolls in to fight persistent Canadian wildfires

See before-and-after images of US landmarks as they get inundated with wildfire smoke

Air quality: Surreal skies grip New Yorkers - in pictures

Delhi: The city where it is dangerous to breathe

Mask and air filter sales spike on Amazon as Northeast still lives with smoke

Smoky, dangerous haze parked over U.S. East Coast for second day