Quick Answer
To conserve water when stranded in the desert, collect and store dew, use a solar still to purify water, and ration your existing water supply to make it last as long as possible. Avoid drinking water from cacti or plants. Ration your water to 1/2 cup every 2 hours.
Storing Dew
Collect dew during the night by placing a clear plastic bag over a branch or a string. The dew will collect inside the bag, allowing you to store it for later use. Aim to collect at least 1/4 cup of dew per night.
Purifying Water with a Solar Still
A solar still can be made using a shallow hole, a container, and a rock. Dig a hole about 6 inches deep and place a container in the center. Place a rock in the center of the container and add a small amount of water. Cover the hole with a clear plastic sheet and weigh down the edges with rocks. As the sun heats the plastic, water vapor will rise and condense on the underside of the plastic. Collect the water and use it for drinking.
Rationing Water and Signaling for Help
Ration your existing water supply to 1/2 cup every 2 hours. This will help extend its lifespan. While rationing water, use a mirror or a shiny surface to signal for help during the day. At night, use a fire or a flare to signal your location. Stay close to your vehicle to stay protected from the sun and wind. If possible, use a piece of cloth or a jacket to create shade and reduce heat exposure.
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