my husband has two boys from someone and people have been contacting him telling him that his kids is without food and heat and they have recently

If the children are in an emergency situation he should definitely try to do something to help them.  He should make sure of his information and his sources before  filing for emergency custody.  He should talk to a qualified family law attorney before he files so that they can discuss in depth the issues and the evidence he will need. He should also think seriously about hiring an attorney to represent him in this matter because custody cases can get quite complicated.