Department of State warned that Schedule A (Nurse) visas may be unavailable soon. Here is the statement:

Based on current number use patterns we should be able to allow the category to remain "Current" for October. If so, it is very unlikely that there will be more than 1,000 remaining for use during November. That would mean the imposition of a November cut-off date, and the category could become "Unavailable" at any point during the month. But, because of "numbers are running out" warnings in recent Visa Bulletins, it would not be unreasonable to expect demand to increase in the coming weeks, which would use up numbers much faster.