So I'm not sure this is exactly the place I should be asking this question, but to be honest, I'm not sure where else to start. This is overall a pretty complicated situation, so I will try to keep it as simple as I can.
To start, some basic information. Location: Oklahoma. My mother (50), after being on illegal drugs most of her life, has been sober and living with her mother for almost 2 years. 1 year ago, I moved into my grandma's house with the 2 of them, and what I have seen of her behavior has me VERY worried for all of our safety.
Just to clarify, I am not 100% certain she is off drugs; I just believe that to be true, having seen her on drugs more times than I can count. She has never been diagnosed with anything of note, even prior to drug use, as she's never been the type to go to the doctor. So, this may be something she's always experienced. I suspect if this were the case, everyone around her would've excused and enabled her behavior the way they are doing now.
The year that I have lived here, I have witnessed her have several delusions, outbursts, and incidents—including, but not limited to the following: almost starting fires/flooding the house on multiple occasions while dozing off doing random activities (I suspect this is a medical issue she refuses to get checked out), getting into minor physical altercations (throwing things, pushing, etc.) as well as numerous aggressive verbal altercations with my grandma (75), giving herself chemical burns trying to kill nonexistent bugs living in her clothes and bedding, and constantly talking about and to different voices/delusions she has of God, angels, and the Devil himself.
She is constantly on edge, either exercising demons, chemically decimating her skin barrier to kill "bugs," refusing to sleep, or ranting about government conspiracy theories and messages God sends her. Even without the threat of accidents that could destroy the house, or the possibility of a meltdown causing her to try to harm someone, the stress of the constant doomsday talk, and agitated/hostile demeanor, I believe is negatively affecting my grandmother's health, and I'm not sure what to do about it.
Now, on the surface, this seems like a simple case. However, on paper, my mom is completely functional. She's been able to hold a job for a year (hotel maid), has a valid driver's license & car (scary, I know), a stable home, a (for the last 5 years) clean criminal record, and worst of all, absolutely no medical paper trail/diagnosis. Most of this is, of course, due to my grandmother providing for her. I don't believe she could've accomplished any of that on her own, but my grandma simply refuses to leave her to her own devices. That's the kicker, really. I have an entire family ready to back her up and vouch that she's perfectly healthy, as they all have a distrust of doctors, modern medicine, and the government as a whole. If I were to file a report of some kind saying she's a danger to herself/others, I have no doubt at least a couple of family members would contradict me. I have no way of getting her to a professional of her own volition, no paper trail of past medical issues, and no outright threats or police reports within the last 5 years to fall back on.
Frankly, I have no idea where to begin, or if there is even a solution here at all. I desperately want to move out. But, I'm afraid that if I do, someone will end up getting hurt or even killed. I eventually plan to leave the state, and when I do, I am very confident my mother will end up on the streets once my grandmother passes. If anyone has any idea how to handle this situation, please lend some advice.