Two interesting and valid examples of personal preps given above, but that does not address the question of what if any preps are made by the hotel or TPTB in case of a fire evacuation in severe weather, perhaps in a blizzard.

Most members of these forums have no doubt given the matter some thought, probably considerable thought if they live in or visit cold locations. But what about the ill prepared hotel visitors who sleep in lightweight night wear, or nothing, and could face an evacuation into conditions definitely dangerous to those unsuitably dressed.

There would seem to be some merit in providing a detached and heated building at a safe distance from the main hotel, to provide basic shelter in case of fire.
AFAIK however this is not normally done, nor I am aware of any suggestion that this should be provided.