Air quality

Check your air quality forecast in Washington, D.C., Maryland and Virginia, plus see safety tips.

Large wildfires have been burning for more than a week in Canada. News4’s Amelia Draper explains how the changing climate impacts these fires and why they are becoming more intense.

News4 Consumer Reporter Susan Hogan shares how humidifiers and air purifiers can help keep indoor air clean.

The Bay Area’s poor air quality is adding an extra twist to the San Francisco 49ers’ home opener in Santa Clara Thursday night.

The Environmental Protection Agency is delaying plans to tighten air quality standards for smog despite a recommendation by a scientific advisory panel to lower air pollution limits to protect public health.

The D.C. area is in for a smoky summer. Here’s a map and some safety tips for those code orange, code red or even code purple air quality alert days.

Canadian wildfires will send worsening smoky air across the country and neighboring United States in coming days after recent heavy rains in Quebec missed the places where the fires are most active, officials said Wednesday.

As hazy, unhealthy air overtakes the D.C. area, News4’s Megan McGrath checks in with how people are coping near the National Mall.

An air quality alert is in effect in the D.C. area on Thursday because of smoke from wildfires in Canada. It comes less than three weeks after D.C. was gripped by the worst air quality on record.

The D.C. area is under a code red air quality alert. News4’s Megan McGrath reports on conditions from the National Mall.

Storm Team4’s Doug Kammerer and Amelia Draper explain D.C.’s air quality alerts and what’s expected this summer.