My aunt has dementia, lives alone-30 minutes away from family. What are my options?

My aunt is 78 years old and was diagnosed with Dementia. (Just like her mother had) She lives alone-WITH A POOL (doesn't know how to swim) and lives roughly 30-40 minutes away from family. My other aunt (her sister) has Power of Attorney and is not making any steps to find her an assisted living facility. My family does not get a long very well since their parents passed (my grandparents). From what I know, my aunt's doctor has stated she should NOT be living alone. However the POA has not acted on this advice. Someone checks on my aunt about 2 times a week...and sometimes she stays with my mother or the POA if she has doctor appointments. I've watched her behaviors-she doesn't really know how to make food anymore, she can't dress herself, her memory is bad and can't remember recent events. I've called the elder abuse line and they were of no help. I do not know what my options are at this point. I don't want her living alone; she has the money to live in a senior home/assisted living. My deepest fear is that the POA is keeping her alone in order not to "burn through any money" that she may be getting in the will if God forbid something was to happen. Any advise would be appreciated. Thanks!! (And before anyone suggests it-I could not take her in; I have two young children and work full time, I would not have the ability to give her the ongoing care she needs.)