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

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

Wildfires -- and their toxic smoke -- are affecting us more often. What can we do about it?

Wildfire smoke continues to wreak havoc on US sports

Why skies in the Northeast are turning orange from the smoke

Raging wildfires in Quebec drive intense smoke and hazy skies farther across the eastern US and Canada

Get ready for more of this smoke

La Guardia and Newark flight delays over Canada wildfire smoke

FAA issues ground stop at LaGuardia airport due to smoke

Canada wildfires: Tens of millions under air quality warnings as fires burn

Canada could see its worst wildfire season on record

Smoky week ahead from wildfires in Canada is expected to lead to more alert warnings for the Northeast