How to Survive in a Cave

Caving, sometimes known as spelunking, can be a fun, exciting hobby and a valuable tool for scientific discovery. But the hidden world of caves can be as dangerous as it is fascinating, and even the most experienced cavers can easily be injured or get lost in a cave. When something goes wrong below ground, you can quickly find yourself in a survival situation. Here’s how to make it out alive.

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Caving is inherently dangerous, but you can reduce the risk by learning proper caving techniques, bringing the right equipment, and knowing how to use your techniques. Especially if you’re new to caving, don’t go in without an experienced guide, and never explore caves alone. Always make sure you notify someone where you will be and when you expect to return so that they can notify rescuers if you can’t. Bring warm, NON-COTTON (like polypro or polyester) clothes and a plastic bag or emergency blanket. It is important that all layers of clothes are made of a synthetic fabric, even undergarments and socks. Cotton absorbs and holds much more water than synthetic fibers. Wearing standard cotton garments in a cave will cool your body very rapidly. If cotton layers are worn (as an absolute last resort) make sure they are above the synthetic layers. Doing the opposite will rob your body of heat, as the most wet layer will be in direct contact with the skin. Also, make sure your flashlight or headlamp is in good working condition (and bring a spare light source and batteries). The best way to survive in a cave is to know the cave and to be prepared.
Caves can be maze like and confusing, but there’s almost no reason to get lost in one. Always be aware of your surroundings, and note landmarks. In addition, be sure to mark the way out at all intersections. Use rocks to make an arrow pointing the way you came, scratch an arrow on the cave floor, leave yourself notes, or tie ribbons or leave glow sticks to show you the way back. Make sure you can differentiate your marks from those that other cavers may have left. Not only will marking your path help lead you out safely, it will also help rescuers find you if you can’t get out on your own.
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If you do find yourself lost, injured, or trapped don’t panic. Assess your situation and think clearly about how to get out.
There is safety in numbers, so be sure to stay together. Hold hands if you must move in darkness, and don’t let anybody fall behind.
Caves are frequently cold, and hypothermia is one of the most dangerous hazards you will face. Always bring warm, non-cotton clothes, and pack a large plastic bag in your helmet to wear as a poncho to conserve warmth. Keep your helmet on at all times. If you have to endeavor into water (i.e. if the cave is flooded, or if you must cross a stream) take off your clothes to keep them dry, and then dry off and put them back on when you’re out of the water. If your clothes get wet and you don’t have replacements, wring them out thoroughly and wear them so your body heat can dry them. Huddle with your group for warmth, and minimize contact with the cold ground. Try to keep moving (even if it’s just moving in place) if you get too cold, but avoid breaking a sweat.
If you told somebody on the outside when to expect you—and you absolutely must do this—help should be on its way soon. If for some reason, such as flooding or cave collapse—it may take a while for rescuers to come, make sure to ration your food and make it last. Make sure everybody gets enough water, but don’t try to save it as long as possible—keep well hydrated even if you’re not thirsty. If you run out of water, you can drink water you find in the cave, but be aware that it may be contaminated and should only be used as a last resort.
Turn off flashlights when you are not moving, and use only one at a time. Form a chain of people following one with a flashlight. If you're using a headlamp, use the lowest output setting.
Unless you are quite certain that help will not be coming, do not move without light. A cave is a dangerous, unpredictable environment, and the risk of injury outweighs all other hazards. If you must move without light, proceed with extreme caution. Crawling may be the best option to avoid falls.

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How do I survive in a cave if I'm alone with no light?
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Stay put if you don’t have light. Unless you are quite certain that help will not be coming, do not move without light, you could injure yourself.
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How do I survive and escape an avalanche in a cave?
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Try your best to calculate your distance from the entrance of the cave and attempt to dig yourself out.
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What are my chances of getting trapped in a cave?
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It is rare to be trapped in a cave, but important to be prepared just in case.
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Tips

Mobile phones, watches, and other such devices may be used to provide backup light.
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Always put cell phone, lighter, and matches in a ziplock bag to keep them dry.
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If you are deep in cave, try to feel where air is flowing and follow it to the source. There are usually multiple ways out from a cave.
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Warnings

Avoid making vertical ascents over rock that is wet, as this will be particularly susceptible to collapse.
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Do not drink cave water with a strong odor or which you know to be contaminated.
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There are quite a lot of sheer drops in caves that would kill a person was he to fall through them. When walking without light, always, Always, ALWAYS check the area around and at the place you are about to walk to.
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Look out for sharp stones and slippery rock while moving about in a cave
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Do not attempt to move a badly injured person. Keep the victim immobilized and warm and get the assistance of experienced cave rescuers to extricate him.
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Beware of the water in a cave, especially during flooding. It can be difficult to ascertain the depth of the water, and there may be a hidden current.
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