One thing's for sure, even if the oats hadn't died, they would have been to mature to be attractive in hunting season. Oats is a cool season annual and 100 degree temperatures is something just about any cool season plant can not handle, even with moisture available. The Oats would yield much higher quality forage planted around the first of September or slightly later. High temperatures are still possible, but with decreasing day length, growth will be slower and the heat is bound to subside with each passing day.