Interesting, I have had a nearly opposite experience in the past.
At one retail job I had, if you needed a shift off, you had to find someone else to agree to cover your shift. That was basically the whole process of getting out of a scheduled shift. Take a shift off, fine, but it was the responsibility of the worker who needed a shift covered to get that shift covered.
Hate to be that person, but hyperthermia is too high body temperature.
Hypothermia is below normal body temperature.