This is the kind of thing Rod Serling made shows about*:
Tsunami Survivor Rescued, Warning System Agreed
BANDA ACEH, Indonesia (Reuters) - A lone tsunami survivor has been rescued from a remote Indian island, officials said on Saturday, a rare moment of hope in the Indian Ocean as nations pledged to try to stop such a disaster happening again.
In the Andaman and Nicobar islands, an archipelago 750 miles from the Indian mainland, a military officer said a tribal man had been rescued after surviving alone for nearly four weeks eating only coconuts.
Mangal told rescuers the first giant wave sucked him out to sea before subsequent waves flung him back onto the tiny island of Pillow Panja where he discovered everyone else from his village was gone.
As far as he was concerned, he was the last person on earth. Must have been an odd experience. Sadder still is the fate of the whole village.
*Yes, I just showed my age.