An old trick is to turn over half-buried stones in the desert just before sun up. Their coolness causes dew to form on their surface.

Desert grass will also form dew in the pre-dawn with your tongue. It can be soaked up with a cloth and wrung out into a container.

Where sand dunes meet the sea digging above the high tide mark might reveal a thin layer of fresh water sitting atop a heavier layer of salt water.

Flies and mosquito's are a giveaway for a water source and bees fly in a straight line to and from water up to 1000 meters away.

Look out for pigeons and doves - they can only exist near fresh water

Water seepage in canyons, small pockets of water in sandstone rock formations and digging at the base of rocks and mountains can produce water

Even contaminated water has its uses. It can be used to soak your clothing and reduce water loss from perspiration.