Most people have heard of the four basics needs for survival: shelter, fire, water, and food. Let's zero in on one of them...water.
I remember one of the most amazing experiences I have ever had with fresh water in the wilderness. I was about a week into a rafting trip down the Grand Canyon. One day of the trip, we went for a five mile hike up into the desert canyon. The temperature was over 110 degrees F. The dry desert landscape showed little sign of fresh water. That changed as we rounded a bend in the trail that put us at the base of a 500 foot high red wall limestone rock face. Hundreds of feet above us an enormous spring roared out of the rock wall face from a cave, landing in a large pool at the bottom of the cliff. It was the only time in my life that I have ever swam and drank the water at the same time. I can still hear the roar of the water fall. The dramatic contrast with the parched landscape surrounding this spring highlighted the value of this amazing resource.
As summer approaches, much of the northern hemisphere starts to dry out, shifting the water dynamic. Depending on the landscape, you only have a few days that you can survive without water. Less than 1% of the Earth's water is suitable for drinking. Over 3.6 million people die every year from diseases from drinking unsafe drinking water. Unless you find a spring where the water is coming directly from the ground, it is generally not safe to drink directly from most streams, lakes, ponds, or rivers. You have to purify the water.
One way to purify water is by boiling it. One way to boil water in a wilderness situation is by doing a rock boil. In this method, you heat stones in a fire, then after brushing the ashes off of them, you drop them into your container of water. You need to make sure these stones aren't "wet" stones, meaning that they aren't gathered from places like streams, or from underwater. Wet stones can be like a sponge and explode when heated.
Check out this short demonstration video where we show how to boil water with rocks.
It might just save your life some day.