Millions of people living in California have been warned against doing any outdoor activity because of bad air quality amid ...

Air quality across parts of California is deteriorating to hazardous levels as strong winds drive rapid wildfire spread and stir up heavy dust.

At least one-quarter of all nitrogen oxide (NOx) emissions in California’s Salton Sea air basin come from soil, according to a study from UC Davis. Using isotopic analysis, the study found that ...

On Sunday at 6:48 a.m. an air quality alert was issued valid until 10 p.m. The alert is for San Bernardino and Riverside County Valleys-The Inland Empire, San Bernardino County Mountains, Riverside ...

Santa Anas are created by high pressure over the Great Basin — the vast desert interior of the West overlapping several states. The sinking air loses its moisture and flows in a clockwise direction ...

At least one-quarter of all nitrogen oxide (NO x) emissions in California's Salton Sea air basin come from soil, according to a study from the University of California, Davis. Using isotopic ...

An air quality alert was issued on Sunday at 9:59 a.m. in effect until Tuesday at midnight. The alert is for Calabasas and Agoura Hills, Catalina and Santa Barbara Islands, Eastern San Fernando Valley ...