Most of the fires grew out of control under extreme heat conditions made up to five times more likely by climate change.

Smoke from northern Minnesota and western Ontario wildfires is pouring over the Great Lakes, mid-Atlantic and Northeast, bringing record levels of hazardous air pollution to major…

Wildfires in Canada are pouring thick clouds of smoke into the US and will usher in unhealthy air quality for millions of people in Northeast and Midwest.

States warned residents about air quality issues that could last for days