Accidental hypothermia: an involuntary drop in core body temperature below 35°C (95°F)
List clinical features of mild hypothermia.
Mild hypothermia (32–35°C/ 89.6–95.0°F)
Alert, impaired judgment
Amnesia, dysarthria, ataxia
List clinical features of moderate hypothermia.
Moderate hypothermia (28–32°C/ 82.4–89.6°F)
Worsening CNS depression, e.g. lethargy, stupor
Bradycardia, cardiac arrhythmias
Loss of shivering typically occurs 
Cold diuresis: Peripheral vasoconstriction in hypothermia increases central and renal blood flow, which causes antidiuretic hormone suppression, resulting in diluted urine.
Paradoxical undressing: the abnormal removal of clothing by patients despite low ambient temperature