Body Heat: 107.6 F
When a person's core body temperature hits 107.6 F heatstroke can't be reversed and will prove fatal.
Cold Water: 40 F
Water saps body heat. A person would last barely 30 minutes in a 40 F sea.
Hot Air: 300 F
In a burning building or a deep mine adults can survive 10 minutes at 300 F. Although children soon succumb in a 120 F car.
High Altitude: 15.000 Feet
Consciousness fades for most people at 15.000 feet. Although highland dwellers have adapted to have larger lungs and more red blood cells so that they can survive.
Starvation: 45 Days
If a person loses 30% of their body weight, death is imminent. Although, disease would probably kill a person before they have a chance to starve.
Diving Deep: 282 Feet
When diving deep without equipment most people black out before reaching 2 minutes once they are below 60 feet. The best free diver made it to 282 feet before blacking out.
Lack Of Oxygen: 11 Minutes
Typically, a person would pass out after 2 minutes without oxygen. With training, people can hold their breath for nearly 11 minutes.
Blood Loss: 40%
A person can survive after losing 30% of their blood. After losing 40% of your blood a person would need an immediate blood transfusion.
Dehydration: 7 Days
Every cell in a person's body needs water. Without being able to replace the quart of water a person loses per day, a person will need more than a week at most.

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