GREEN BAY, WI (WTAQ) - Athletes taking part in the 2012 Bellin Run battled some hot temperatures in the push to the finish line.

Officials say 18,428 people registered for the 10K, which was slightly down from last year's record turnout of 18,701. It was the first drop in 7 years.

But over 1,300 volunteers were on hand to help keep those runners in the 36th annual race cool. More than 100 medical personnel were also in attendance.

Race organizers used a color-coded alert system to let runners know about the weather conditions. Yellow was indicated at each water station, which meant that the conditions were less than ideal, but not dangerous.

"Heat is going to be our primary concern today. We have misting fans along the course. We have athletic trainers and fire department paramedics on bikes roaming the course the entire time," Bellin Run medical coordinator Roland Schmidt told FOX 11.

The temperature was at 76 degrees at the start of the 8 a.m. race.