Can you get emergency custody if the parent is shooting up herion and the children has to sleep in the floor

You have a very complex legal situation on your hands and I strongly encourage you to contact an attorney in your local area.  In short, if a parent is shooting up heroin when the children are in the house, my opinion is that the children are at risk of immediate bodily injury which would be grounds to file for emergency custody.   View one of our blogs for more on emergency child custody in North Carolina.  You may also consider contacting DSS.   It is difficult to give additional information here without more facts, but as grandmother, you would also have to establish standing for a custody action if you were the one filing (rather than a parent).  Hope this helps a bit.