Smoke from numerous Canadian wildfires is again impacting the Philadelphia region this week, with environmental authorities ...

Smoke from ongoing Canadian wildfires has led to some of the worst air quality in the world across parts of the U.S.

Forecasters say weak winds have left Canadian wildfire smoke to linger over the U.S. Stronger winds are expected to bring ...

Air quality alerts were in effect in Iowa, Minnesota, Wisconsin and Michigan, as well as eastern Nebraska and parts of ...

Minnesota summer camps have had to cancel kids activities like capture the flag and horseback riding as they contend with months of poor air quality driven by Canadian wildfires. On Sunday, state ...

Canada's worst wildfire season on record, fuelled by extreme heat and climate change, is triggering global health warnings ...