How can you help an addict?

Hi everyone! Not sure where else I can ask this.

How can a person, who has a drug addiction be helped? She is a young 25 year old who recently got her 2 yr old taken away. She is starting to live in her car, may have an STD. I want to know, how can we make her see that she needs help? Nothing we say seems to mater to her. We know that she’s the one who has to want to, but how can we start that in her? Does something really bad have to happen so she can seek help? Any advise would be appreciated. Very sad to see someone like that and feel like we can’t do anything. It would be great to do something before it’s too late. Thank you 😊