Support orders in Florida, including child support and most alimony awards, are subject to modification, based upon a change in circumstances.
There is a statute on point in Florida which governs the procedure for modifying support orders. See Florida Statute 61.14.
The statute is broad, but the essence of the law is to provide for a modification when there is a material and substantial change in circumstances, which was unanticipated, or when the financial circumstances of the parties warrant a modification.
Divorce in Florida is conducted in "courts of equity", and fairness to all those involved is an underlying characteristic of these proceedings.
If an obligor who is paying support has fallen on bad times through no fault of his or her own, the court should be readily willing to make the appropriate adjustment in support, either on a temporary permanent basis.