I recently came across this picture that I had taken a few years ago while on a solo Boundary Waters Canoe Area Wilderness trip. Some forest fires had been raging far to the northwest in Caribou Provincial Park, Ontario Canada. The sky for several week always appeared gray during the day with visibility between 2-5 miles.
Sunsets were fiery and ominous to behold on that trip, like the one seen here.
This picture was taken with a Samsung cell phone, I don’t recall which model.