Green Bay Marathon in Wis. Halted Because of Heat A Wisconsin marathon has been halted because of heat. Green Bay police say the race was stopped about 9:30 a.m. Lt. David Paral says there were cases of heat-related sickness, but he doesn't have information yet on how many. The Cellcom Green Bay Marathon started about 7 a.m. Race director Sean Ryan told the Green Bay Press-Gazette that about 8,000 people had registered for the event. The National Weather Service predicts a high of 82 degrees in Green Bay on Sunday. The newspaper reports the temperature was already 70 degrees with 63 percent humidity when the race started.