Without limiting the authority of any state officer to declare or to act on an emergency, the Director or local air pollution control agency, upon determining that a generalized condition of air pollution exists or that the emission from one or more stationary sources of regulated air pollutants is causing a danger to human health or safety, may order persons causing or contributing to the air pollution to immediately reduce or discontinue all emission of contaminants.
Nev. Admin. Code § 445B.229
NRS 445B.210, 445B.450