Air alert: Smoke, ozone on the rise in San Joaquin Valley

Facing the double whammy of ozone and smoke, local air quality leaders have declared a second alert, running Monday through Wednesday, for the eight counties in the San Joaquin Valley. The region is sweltering with temperatures forecast above 100 degrees with only light breezes -- conditions that lead to ozone formation. The sprawling Rim fire in Stanislaus National Forest and Yosemite National Park is sending smoke and ozone-making gases into the Valley. Read more here (Fresno Bee, Sept 9)