IMHO - water is way down the list. This is a general list. Don't get wrapped up in arguments about fine details.

3 SECONDS - Major arterial blood loss, gun shot, knife wound, being crushed, a fall, other accidents.

3 MINUTES - Suffocation, drowning, avalanche, heart attack, cave in, gas poisoning, serious blood loss.

3 HOURS - Hypothermia from cold, wind and rain. Heat stroke from sun, desert, exhaustion and drought.

3 DAYS - Die of thirst, some water born diseases, food poisoning, snakes, severe infection, tick paralysis.

3 WEEKS - Starvation, bad water, general infection, strong radiation.

3 MONTHS - Starvation, disease, loss of shelter, general health deterioration, weak radiation.

3 YEAR - Poor diet, vitamin deficiency, lack of exercise, despair, chronic illness