So the machete lost out, along with the compass, gun, food, mosquito netting and even the reliable and versatile survival knife. All of those tools are handy and useful, but none of them make a bit of difference if you don't have fresh drinking water. Water is the No. 1 thing you need to survive any environment on Earth -- you simply can't live without it. For this reason, the number one tool you can have to survive in the jungle is a high-quality water filter.
Camping water filters are compact and easy to use -- all you do is drop the suction tube into the water and pump the lever to draw the water into a bottle. Most models use a ceramic filter to get rid of particles as small as 0.2 microns. A micron is tiny -- 0.000039 inches, to be exact. So 0.2 microns means your pump will rid the water of bacteria and harmful parasites.
Humans can go for as long as 60 days or more without food as long as they stay properly hydrated. You can't live without water for more than a few days. In hot conditions with no water, dehydration can set in within an hour. Since you're in the hot and humid jungle you also need to worry about heat stroke. Drinking water will cool you down and lower your core temperature. Knowing the signs and symptoms of dehydration can help you prevent a more serious condition. The stages are:
- Lack of saliva
- Decreased frequency of urine
- Decreased output of urine
- Deep color and strong odor in urine
- Even less urine
- Dry mouth
- Dry and sunken eyes
- Rapid heartbeat
- No urine
- Lethargy and irritability
- Vomiting and diarrhea
At this point, your body will go into shock. Your skin will turn a blue-grey color and be cold to the touch because of a drop in blood pressure. Shock is followed by coma and organ failure, and you know what that means -- certain death, the opposite of survival.
The human body contains about 11 gallons (42 liters) of water. In the jungle, the hot and humid conditions can cause you to lose about 25 percent of that water per day. The water leaves your body as sweat, urine and even in the air you breathe. If you're busy hunting, fishing, gathering wood and building a shelter, you can lose even more fluids than that. This means you need to drink at least two gallons of water per day to function at your physical peak.
Some people might argue that the machete is the most important jungle survival tool, and if you're an experienced outdoorsman or survivalist, this may be the case. Trained survivalists know what kind of water to drink, where to find it and tricks to help purify it. But if you're not a survival expert, making a wrong move with water can cost you your life. You also might spend most of your time looking for water and neglect finding food and shelter. And there's no guarantee you can start a fire without a lighter or match in the wet jungle to help you purify any water that you find. If you have a water filter, you know for sure that you can stay properly hydrated at all times, and this is the first step toward ensuring your survival.
If you're still thirsting for more, filter some water from that cesspool and visit the links on the following page for more survival articles.
Related HowStuffWorks Articles
- Survival Quiz
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- How to Survive in the Jungle
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More Great Links
- "Diseases." jungleformula.com, 2008. http://www.jungleformula.co.uk/diseases/index.html
- "Jungle survival overview." survivalx.com, 2008.http://survivalx.com/regional-survival/jungle-survival-dangers.html
- Anisman-Reiner, Victoria. "Half Your Weight in Water." suite101.com, November 16, 2006. http://naturalmedicine.suite101.com/blog.cfm/half_your_weight_in_water
- Health A to Z. "Starvation." healthatoz.com, 2008. http://www.healthatoz.com/healthatoz/Atoz/common/standard/transform.jsp?requestURI=/healthatoz/Atoz/ency/starvation.jsp
- Koerner, Brendan I. "How Long Can You Go Without Food?" slate.com, June 10, 2004.http://www.slate.com/id/2102228/
- Packer, Randall K. "How long can the average person survive without water?" sciam.com, December 9, 2002.http://www.sciam.com/biology/article/id/how-long-can-the-average