Too Cold to Sleep in Idaho

I was traveling in the winter time across the northern part of Idaho. There was snow everywhere and the roads were slick. It was late at night and into the early morning hours. I climbed into my sleeping bag and curled up in the back seat. I tried to sleep, but it was too cold. I started up the Suburban and continued my drive. In the early morning hours at day break, I drove up on a car stalled on the side of the road. There was a family inside. The children were already turning blue.