Too big for parents to sit over protectively, but still too young to have grown waterproof feathers, downy penguin chicks exposed to drenching rain can struggle and die of hypothermia in spite of the best efforts of their concerned parents. (sciencedaily.com)
Medicine knows a human will die from hypothermia from being in even mild weather. (dotearth.blogs.nytimes.com)
Initial signs of hypothermia in humans include the «umbles»: uncontrollable shivering accompanied by mumbling, stumbling and fumbling. (wildfowlmag.com)