Upon the issuance of an order of drought emergency under RCW 43.83B.405(2), the state treasurer shall transfer from the general fund to the emergency drought response account created in RCW 43.83B.435 those amounts necessary to bring the balance of the emergency drought response account to $3,000,000, based upon the determination of the transfer amount from the office of financial management. The office of financial management must determine the fund balance of the emergency drought response account as of the previous fiscal month before the issuance of an order of drought emergency. The office of financial management must promptly notify the state treasurer and the department of the account balance and the necessary transfer amount once a determination is made. A transfer based on the determination by the office of financial management may be made only once every fiscal year.