The military uses a flag system to alert personnel to the risk of heat injuries. Green flag means no restrictions on physical activity. The index goes from green to yellow to red to black. Today was a black flag day.
Today when I got home from work, power was out in the trailers. Since it was dark and getting very still in the trailer, I put my camp chair outside and started reading my book. On a whim, I stuck my little thermometer on the outside of my trailer.
That picture was taken at 4:30 pm.