New York Times: Air quality officials are warning San Joaquin Valley residents of potential health hazards because of increasing ozone levels and smoke from lingering wildfires. The San Joaquin Valley Air Pollution Control District issued an air alert, the second this year, on Monday for San Joaquin, Stanislaus, Merced, Madera, Fresno, Kings and Tulare Counties and parts of Kern County. Officials have advised people in those counties to reduce prolonged exposure to the air and strenuous activities. High ozone levels...