Lives on the Line

I just found out thirty mintues ago that my distant aunt just died. I am still in shock even typing this now does not feel real but that is not my reason for typing this. My twin cousins are only twelve and their father is a complete drunk who rather wastes his money on alcohol and helping his girlfriend with her 3 grown kids instead of taking care of his own. My aunt's mom is too old for this and can not afford to take care of them the way the need to be taken care of. The basically have no immediate family that can provide for them. As an eightteen year old how can I help them? I do not want them going into the system and I do not want them anywhere near my uncle and drunk drama. Any advice please?
Thank you for
responding
Kayla.