

Anyone with isotonic fluid loss. Alcoholics for instance. People who lose a lot of salt with their sweat(this is both an individual variation and a very well studied version of heat adaption, athletes and outdoor workers end up with b dilute sweat a week or two after they start experiencing heat stress). True dehydration (increased osmolality) triggers thirst but isotonic fluid deficiency may not
You use resources you have to justify them. Maybe to a voluntary committee. Maybe to a Soviet. Maybe to the supreme leaders appointee. Maybe to a sub unit of the technocratic cabal.