The U.S. has one of the world’s most advanced systems to monitor air pollutants. Can it keep up with a changing climate?

As San Luis County's Madre Fire rips through California, air quality warnings are now being issued for nearby areas, ...

The Madre fire burning in San Luis Obispo County has grown to become the largest wildfire California has seen this year. It ...

A massive wildfire scorched 52,593 acres in the southeastern corner of San Luis Obispo County as of Friday morning, forcing ...

It’s been a relatively quiet wildfire season so far in the Pacific Northwest, with not much in the way of large fires or ...

Smoke from the Madre Fire in San Luis Obispo County could potentially bring poor air quality to the High Desert over the July ...

An air quality map shows conditions improving in the U.S. on Friday as smoke from the Canadian wildfires subsides.

Poor air quality due to wildfire smoke can negatively affect health. It's one of multiple climate-driven health risks ...

Smoke from the Canadian wildfires continues to bring potentially dangerous air quality to parts of the northern U.S., with ...

Air quality remained poor in the Northeast on Friday, but conditions were improving across much of the Midwest as rain and winds from the west and south began to disperse wildfire smoke from ...

An air quality alert has been issued for most of Southeast Michigan on Independence Day. The alert is in effect for most ...

In Chicago, the Air Quality Index reached 209 by noon on Tuesday, the worst reading of any major city in the world for the day, according to IQAir, a Swiss air-quality technology company.