Canada's second-worst wildfire season on record has already burned 7.8 million hectares and could continue for weeks, federal ...

Republican lawmakers are blaming Canada for not preventing and containing wildfires, whose smoke has fouled the air in ...

Heavy clouds of smoke billowing from wildfires filled the sky over mountains and hills in northern and western Spain on ...

Researchers have known about the health effects of air pollution for more than a century. The 1948 “Donora smog” in a ...

If you’ve looked outside and noticed a cloud of haze in the air, you’re likely witnessing the impact of the wildfires burning ...

A total of 18.5 million acres of forested land have burned since the beginning of the year, making this the second-worst year ...

Smoke from Canadian wildfires hovered over several Midwestern states Saturday, bringing warnings of unhealthy air. Air quality alerts were in effect in Iowa, Minnesota, Wisconsin and Michigan, as ...