Such additional sums may be paid from unexpended balances not required by law to be expended for a specific purpose, or from contingent funds, where such exist. Where such balances are not available or adequate, or such funds do not exist, such money shall be raised by temporary loans or notes, certificates of indebtedness or temporary loan bonds to be issued as otherwise provided and limited by law for counties of this state, and the amounts necessary to pay such obligations shall be placed in the budget for the next ensuing fiscal year.