Hyperthermia

Autopsy results revealed that Braydon was generally malnourished and thin. His cause of death was hyperthermia due to the extreme heat, which would have “caused extreme discomfort and difficulty breathing as he died.”

Hyperthermia, that's just a word. The reality is different. You can't breathe. Sweating doesn't work. You're being roasted, like meat in an oven, and you can feel that.