The State Department of Social Services may advance up to 90 percent of any federal emergency food and shelter funds under Public Law 98-8 which the state appropriates to the department, to counties or local United Way organizations which have contracts with the department for the purpose of providing emergency food and shelter services. Any interest earned on any funds received pursuant to this section by a county, a United Way organization, or the department shall be used for the purpose of emergency food and shelter services.