when touching the engine after stopped, noticed it is very hot. hot air goes up, and there is no way for the air to flow with the hood closed. so, when the engine is stopped, the temperature increases more that when it is running.
when tried leaving the hood open, it cooled down fast.
perhaps a simple solution may be when you reach a destination, to open the hood until it cools off. and if the sun hits it, place something as a spacer and close the hood partially.