California's Central Valley sadly boasts some of the dirtiest air in the country and the as the temperature goes up, the air quality usually goes down.
Right now, The Weather Channel shows it's 102 in Clovis, a town northeast of Fresno. EPA's AirNow site says the air quality for all of Fresno County has nudged into the "unhealthy for everyone" category. At this level the site says "everyone may begin to experience health effects."
And today is especially important in Clovis, because the city is hosting the prestigious CIF State Track and Field Championships. Scores of athletes from across the state will be competing in air that could make them ill.
But it doesn't stop there. From the Fresno Bee:
To make matters worse, the hourly updates on ozone pollution will be unavailable online at times today because the San Joaquin Valley Air Pollution Control District is performing maintenance on its system.
Ozone is a corrosive gas that often reaches its peak in the late afternoon in the San Joaquin Valley. The CIF championships will begin with field events at 3 p.m. at Buchanan High School's Veteran Memorial Stadium. The running events are scheduled at 5 p.m.