If there is an emergency you can file a Motion for Emergency Orders; including on a Complaint for Modification if there is not an active case going on.  If it is not an emergency you can file a Motion for Temporary Orders; which does take some time to get into place.  It is important to either talk to an attorney about the proper way to write the pleadings and determine whether it is an emergency or not or at least talk to the court.  It would need to meet their criteria.

In addition, you can file a Contempt action and file a Motion explaining why it needs to be heard as quickly as possible. Again, it would be best speaking with an attorney before doing any of these filings or in the alternative speak to someone from the courthouse.