Why does heat stroke lead to coma?

If heatstroke causes coma, the root cause is temporarily that the body temperature is too high. Then we can imagine that the normal temperature of human cells is 37 degrees Celsius. When the temperature in the body reaches 40 degrees Celsius, or even 42 degrees Celsius, that is to say, all the cells in the body are burned out. Including brain cells, obstacles occur in such high temperature environment, so they are in coma. Therefore, if heatstroke patients show coma, it often indicates that the condition is very serious. At this time, we must attach great importance to it.