Smoke from Canadian wildfires hovered over several Midwestern states Saturday, bringing warnings of unhealthy air for at least the third day. Air quality alerts were in effect in Iowa, Minnesota, ...

The impact of one of the worst wildfire seasons Canada has ever seen is being felt across the border in huge parts of the US as potentially dangerous smoke wafts down ...

At 5:52 p.m. on Sunday, the National Weather Service reported an updated air quality alert in effect until Tuesday at ...

Portland and the rest of the southern coast of Maine is under moderate conditions for Ozone Monday. Smoke from Canadian wildfires is being pushed through the state ahead of a cold front, according to ...

On Sunday at 5:05 p.m. an updated air quality alert was reported by the National Weather Service in effect until Monday at ...

The Department of Environmental Protection (DEP) has issued an air quality warning for Monday in parts of northeastern ...

Several studies show the health impact of burning fossil fuels and releasing gases such as carbon monoxide, nitrogen oxides, ...

Beijing's researchers developed a new PM2.5 analysis method to identify pollution sources and help reduce air pollution.

"Wildfire smoke looks to persist throughout Michigan through at least Monday as winds shift," said state meteorologist Alec Kownacki.