Dealing with an addict

So my brother has been doing drugs (meth for sure, who knows what else) for quite some time now. He is almost 30, lives with my parents and though he has been confronted on several occasions about his drug use, he refuses to get treatment. Early yesterday morning my Dad found him convulsing on the floor, covered in vomit and urine - he OD’d (he survived) and now that he is out of the hospital he is still refusing to go to rehab. My parents refuse to kick him out, they don’t want him to die on the streets. My main concern (other than my brother’s health) is that my mom watches my 19 month old daughter when I work. So what do I do? I can’t allow her to go to their home any longer - right? Advise please 😔