How do cabeza de vaca and his men reach the island ? what might their landing on the island seem like a miracle to them?

Cabeza de Vaca and his men reach the island when a huge wave pushes them onto land. This may seem like a miracle because they did not imagine to survive. When they got to the island, they thanked God they are still alive and then made fire and parched corn.

The basically got killed by the environment and white people