Uh, no. Context is all and when speaking of an accident, "survivors" means those that did not die in that particular incident, yet were present. 
If your usage were correct, it would lead to nonsensical situations. Dispatch: "Are there any survivors?" Answer: "We don't know." D: "What do you mean you don't know? Should we send ambulances w/medical personnel or not?" A: "I can't answer that until I do some research about their families, spouses, friends, et al!"