Judgement goes first, so the person affected is the last to know
Early signs in others
Stumbling, fumbling with zips, slurred or reduced speech, and unusual quietness. All appear before anybody feels unwell.
What not to trust
Their own account. Someone saying they are fine while unable to work a buckle is the classic and dangerous presentation.
What to do
Stop, shelter, insulate from the ground, and get warm sweet drinks in. Do not rub limbs and do not press on regardless.
