Cal. Water Code § 25725

In cases of emergency by which the flow of water in a canal or other supply is interrupted, the amount of the cost of the repairs not to exceed in any one year forty thousand dollars ($40,000) may, in addition to any other assessments, be levied by the adoption of a resolution by at least four-fifths of the members of the board at the time of the levying of the annual assessment, without the submission of a proposal for the levy to the voters.