The smoke from wild fires in the northwest (Oregon, Idaho and California) has been drifting over the Rocky Mountains for about a week. With the smoky haze, the mountains are barely visible. A cold front passed through today clearing some of the haze. That provided this red sunset.
With that cold front in control. today's temps did not get beyond the mid 70s. Could that be the first warning that fall temperatures will soon be the norm rather than the 90s and 100s. Sounds great!
Soon it will be time to hitch up and start the journey south to warmer weather for the winter months. That is planned for mid-September.
To see where those fires are burning, see the Active Fire Map.