Throat and Chest

Symptoms
Harsh, dry cough that's worse at night. Lungs rattle with fluid.

Problem
high-altitude pulmonary edema (HAPE)

What do you do?
DESCEND to a lower altitude. Stay warm. If this goes untreated and you become oblivious or unconscious, then you've got high-altitude cerebral edema (HACE) and could die within hours.