Setting Writing Prompt: Shipwrecked

Tropical islands can be a paradise.  However, things can get serious if you are shipwrecked and stranded on one far from civilization. So many questions get urgent:  Where would you get water?  Where would you get food?  How could you get help?  How could you get back to civilization?  

For today's writing prompt, write a short story that features 

survivors stranded on a tropical island.