The numbers are out: vacancies in homes have hit an all time high. According to the report, 18.6 million homes currently are vacant and unoccupied in the US. The report cites the primary cause as the still occurring national real estate housing and real estate downward trend. This figure represents an increase of 6.9%. It also provides some detail regarding the housing rental market as well – and shows that the slowing real estate markets are having an effect across the board beyond just homes sales.