The Spy Who Washed Ashore

You wake up on the beach and wonder how you got here. You are completely disoriented and confused. The sun is shining and it is very hot. Your shorts and shirt are wet. You look around at your surroundings. You are on a deserted beach with white sand. You squint into the sun and can see some cliffs and rocks at one end, and there is some scrubby coconut palm trees behind the sand dunes not far from where you are standing. You brush yourself off and gather your thoughts. You are desperately thirsty and need water. What do you do?