The high was 89 degrees on October 7, 2007. For the first time in Chicago Marathon history, officers cut the race while hundreds of runners working on oven-like streets are being treated for heat-related illnesses. The shutdown occurred about 3 1/2 hours after the start amid complaints of insufficient water for nearly 36,000 runners. Of the 35,867 that started, 24,933 finished. More than 300 runners were taken from the course in ambulances. One runner, a Michigan police officer with a heart condition, died, though the Cook County medical examiner’s office determined his death was not associated with heat.