Air quality is in the "unhealthy" range for an area around La Pine in Oregon, and Portola in California on Tuesday morning.

Air quality is in the "unhealthy" range across several counties in Oregon and California on Wednesday morning.

PAST IS PRESENT: California is looking to the past for a path forward after the Trump administration axed its electric ...

Holiday gatherings often mean additional traffic, busy kitchens, and more activity around the home. With stagnant air ...

The Bay Area Air District has issued Spare the Air alerts for this Wednesday and Thanksgiving Day, marking the region's first ...

A recent study led by scientists at NASA's Jet Propulsion Laboratory in Southern California and the nonprofit Aerospace ...

The Bay Area Air Quality Management District has issued Spare the Air Alerts for today and Thanksgiving Day. The alerts ...

Environmental groups say the EPA is dragging its feet implementing new pollution reduction plans, affecting the health and ...

Federal and local authorities continued to battle a fire on an Ocean Network Express container ship on Monday — the fourth ...

Time lags and errors in the issuing of shelter-in-place alerts during a massive hazardous materials fire at the Port of L.A.