Smoke from the Northern California wildfires is affecting air quality throughout the entire San Joaquin Valley, prompting local air pollution officials to issue an Air Quality Alert. The San Joaquin Valley Air Pollution Control District issued the Air Quality Alert on Wednesday due to smoke impacts from wildfires for San Joaquin, Stanislaus, Merced, Madera, Fresno, Kings, Tulare and the Valley portion of Kern counties. The alert is in effect through Saturday.