What do you do when your neighbor is suffering from early stages of dementia and Alzheimer's?

She lives alone and her children do not want to put her into a home. They have disconnected her stove/oven because they do not want her to cook and forget to turn off the gas. There are family problems among the children where they do not talk to one another. I am under the impression that whoever is in charge of the money does not want to put her into a home because then they will have to use whatever money is there to pay for her living expenses in the whatever facility they choose. The children do not come and visit very often except for the one who comes once or twice a week but does not stay very long. I do not want to intervene but I do think something needs to be done and I do not think she should be living in that house alone given her decreasing mental health. Is there anything that can be done?