Warning signs include the mom forgetting she did things and blaming the daughter, yelling at the daughter for hours for waking her up from a nap to ask her a basic question, harassing the daughter on and on without dropping the topic, being incoherent, telling the daughter the daughter is an adult even though the daughter is 16, possibly giving the daughter drugs, slamming things around and throwing a fit, threatening to.make.the.daughter live with her uncle whatever the fuck this means. Mom hears voices and shit.and is delusional. This is the same mom who put a dead cat in the fridge.
Telling the daughter she is not allowed to see a pastor because the pastor does not want his elderly mother smoking pot whatever the hell that means. Mom is an alcoholic gives her daughter underage alcohol and keeps yelling at the daughter for shit she herself told her to do. And the mom is on drugs in the sense that she mixes tobacco and weed together because it causes a hallucinogenic affect she claims.
Sadly however in the state of Hawaii foster care could be worse so it's a hard call to make.