I just ran across this 2011 posting on the Montreal 2012 Degrowth Conference web site and thought it worth repeating. Note the paragraph:
Once body temperature reaches 41C (104F) its thermoregulatory system begins to break down. Sweating ceases and breathing becomes shallow and rapid. The pulse quickens, and the victim may lapse into a coma. Unless drastic measures are taken to reduce the body’s core temperature, the brain is starved of oxygen and vital organs begin to fail. Death will be only minutes away unless the emergency services can quickly get the victim into intensive care.
The humidex in Ottawa today is projected to be 43!