Hyperthermia can kill even after the victim is removed from the conditions that caused it is the lesson from a case currently going through the US federal court. Whatever the right and wrongs of the case itself, brought by the widow of a Latvian engineer it is a reminder of a very real danger.
Hyperthermia occurs when the body can no longer control its temperature at a normal level of 37.5–38.3 °Celcius. Symptoms can include dry, red skin, nausea, vomiting, headaches, dizziness and fainting. Unless treated quickly the result can be coma and death.