Oh wow that is interesting to note, my kids both had fevers over 40 recently and the one thing the Nurse said was to make sure we dealt with the fever appropriate to their reaction if they were shivering to give them a light blanket(not to over heat but not to chill them ITMS) and if they were sweating to dress them down in a warm house. I always wondered about it because Iz at one point was saying I'm cold mummy but she was at 40.2.