You can file a petition for guardianship with the probate clerk at your local courthouse. You can download the forms here http://www.courts.ca.gov/forms.htm?filter=GC, or you can probably get a guardianship packet from your clerk (different counties handle this differently). The forms themselves are not that complicated but the process can be a bit difficult to manage on your own. You might consider consulting with an attorney in your area who handles these matters. In any case, when you do file you should request both temporary and general guardianship. You will want to write a strong declaration outlining all of your concerns and the abusive or neglectful behavior that supports your request. This will accompany your petition.
Please keep in mind that your mother will likely be furious once you file for guardianship. I say this only because if there is a way to help the children or to get your mother to agree without the need to expose her in this way you might try that first. I wish you the best of luck and commend your commitment to ensuring the safety of your siblings.
Answered on Feb 05th, 2016 at 1:10 PM