| | Conditions Treatments | Altitude Sickness Very high body temperatures are often fatal because they can? Very high body temperatures are often fatal because they can denature proteins and damage cell membranes, leading to organ failure and death. Altitude Sickness - Related Articles What are the 5 types of tears? How to Handle the Upper Plate of False Teeth Steps to Lower Cholesterol How to Use Acupressure Points for Lower Back Pain Grey Hair Treatment List of Low GI Foods How to Diagnose Ankle Instability