Be cast away
Definition 1 of 2
Pro Tip 1/3Literal Use
Used literally to describe physical abandonment or isolation often due to a disaster. 
He was cast away on the rocky shore after the tsunami.
Pro Tip 2/3Dramatic Effect
Adds drama when describing someone left somewhere remote or inaccessible. 
Lost in the forest, they felt like they had been cast away from civilization.
Pro Tip 3/3Emotional Impact
Conveys feelings of solitude and helplessness. 
Marooned by the storm, the lighthouse keeper was cast away from all contact.