Air-quality officials are advising people in several Southern California cities to keep their doors and windows closed amid ...

Cities in California, Texas and Arizona are expecting air quality to become unhealthy for sensitive groups on Thursday.

As wind and fire conditions change rapidly, zoom in and out on the interactive map below to see where air quality is worst around Southern California. You can also open the map in a new window here.

What impact those hazards will have on the greater community can vary from minor to catastrophic with vulnerable communities more at risk.

California, where there are three stationary, regulatory-grade air quality monitors, collecting air pollution data. EDF served as the scientific lead, while engineers from the University of Texas at ...

At 7:50 a.m. on Thursday, the NWS Phoenix AZ reported an air quality alert in effect until Saturday at midnight. The alert is for Imperial County Southwest, Imperial County West and Imperial Valley.

Switching from diesel to electric trains dramatically improved the air quality aboard the San Francisco Bay Area's Caltrain commuter rail line, reducing riders' exposure to the carcinogen black carbon ...

A new law tightens building and emissions regulations for large distribution warehouses to mitigate air pollution and traffic in surrounding communities.

The NWS San Diego CA reported an air quality alert at 11:08 a.m. on Wednesday in effect until Thursday at 8 p.m. for ...

California air quality regulators announced the launch of a first-in-nation satellite data project Friday, with the aim of monitoring and minimizing methane emissions. The technology involves the ...

Two months after deadly wildfires razed thousands of homes in the Los Angeles area, Cal Fire has released a new map showing fire hazard severity zones for the entire state. The maps were developed ...