Later in the afternoon a 79-year-old woman lost consciousness about a mile from Going-to-the-Sun Road while hiking the Loop Trail. Park rangers responded, provided medical assistance, and the woman was able to hike out on her own even though ALERT and an ambulance responded.

Germann said as park rangers were leaving the trail, they also assisted a young boy who was displaying signs of overheating.

At 5:15 p.m., a 51-year-old man who was also on the Loop Trail was experiencing difficulty due to a kidney stone, and was flown to Kalispell Regional Medical Center by ALERT after rangers, fire crew members and other park personnel transported him to a landing zone.

Germann had several suggestions for hikers:

• Drink and eat often to avoid dehydration. “By the time you feel thirsty, you are already dehydrated,” Germann said. “Drink one-half to one quart of water or sports drink every hour that you are hiking in the heat. Eat a salty snack every time you drink.”

• Avoid hiking in the hottest part of the day, or choose shaded trails during midday.