Cal. GOV § 8670.57

(a) When the administrator determines that any person has engaged in, is engaged in, or threatens to engage in, any acts or practices which constitute a violation of any provision of this chapter, Division 7.8 (commencing with Section 8750) of the Public Resources Code, or any rule, regulation, permit, or order issued, promulgated, or executed thereunder, and when requested by the administrator, the district attorney of the county in which those acts occur or occurred, or the Attorney General, may make application to the superior court for an order enjoining the acts or practices, or for an order directing compliance. Upon a showing by the administrator that the person has engaged in, is engaged in, or threatens to engage in any violation of the act, a permanent or preliminary injunction, restraining order, or other order may be granted.

(b) For the purposes of this section, “threaten” means a condition creating a substantial probability of harm, when the probability and potential extent of harm make it reasonably necessary to take immediate action to prevent, reduce, or mitigate damages to persons, property, or natural resources.