Pay no attention to the first answer. That only happens if you just skip the payments without warning. The county or city officials should be more than willing to work with you on payment. Like the second person said, just let them know BEFORE the amount is due and they should work with you.
You might be able to get an extension if you contact them before they are due but if they day no which they probably won't then they can hold you in contempt of court and you could go to jail or something along those lines... Good luck