How old do you have to be to in order to become emancipated?

my 11 year old niece is verbally abused by her father whom she lives with. she has tried to talk to him about having suicidal and homicidal thoughts. he just tells her that she is crazy and threatens to drop her off at the crazy hospital. she is left alone with her 8 year old sister late at night so he can get high with the neighbors, he is an alcoholic and has no job and wont look for one. we also think he is using meth again. she takes care of him instead of him taking care of her or her sister. right now she cant live with her mom. her mom has a restraining order against her so she cant see the kids. the dad refuses to let them stay with anyone at all. there are guns in the house that the kids can get to and hunting knives. I am concerned for their safety but I also live in another state. what can I do to help them? I was told that in Oregon the kids have to be basically dying for cps to take them out of the home.