New mom struggling with family crisis involving my brother

I’m struggling after learning the full extent of my 20-year-old brother’s behavior over the past couple years.

A month before my daughter was born, he almost died in a motorcycle accident.

I recently learned he’s been binge drinking, gambling away money, lying about finances, taking on debt, and using drugs. Apparently he was hospitalized for alcohol poisoning after drinking 43 shots at a university event, and cocaine was found in his backpack the morning of the accident. Yesterday he was kicked out of my parents’ home after drugs were found there as well. He denies having a problem and refuses help.

I love my brother deeply and barely recognize the person I’m hearing about now. I feel scared, angry, sad, and completely out of my depth.

What can I do now?