Hot foot or Metatarsalgia is caused by pressure on the nerves causing a burning sensation..."severe cases feel like some sadistic demon is applying a blowtorch".
Boy can I identify with that description! I think my shoes fit okay but with the heat on the day of the Etape the feet probably swelled causing pressure. I wish I had been level headed enough to move the cleat position and shift the pressure. Oh well it's too late now and anyway one reason I suffered from it could be thinning skin due to old age...fits well with my label as a Mamil (Middle Aged Man in Lycra).