Tex. Water Code § 5.509

(a) The commission may issue an emergency or temporary order relating to the discharge of waste or pollutants into or adjacent to water in the state if:

(1) the order is necessary to enable action to be taken more expeditiously than is otherwise provided by Chapter 18 or 26, as applicable, to effectuate the policy and purposes of that chapter; and

(2) the commission finds that:

(A) the discharge is unavoidable to:

(i) prevent loss of life, serious injury, or severe property damage;

(ii) prevent severe economic loss or ameliorate serious drought conditions, to the extent consistent with the requirements for United States Environmental Protection Agency authorization of a state permit program; or

(iii) make necessary and unforeseen repairs to a facility;

(B) there is no feasible alternative to the proposed discharge;

(C) the discharge will not cause significant hazard to human life and health, unreasonable damage to the property of persons other than the applicant, or unreasonable economic loss to persons other than the applicant; and

(D) the discharge will not present a significant hazard to the uses that will be made of the receiving water after the discharge.

(b) A person desiring a temporary or emergency order under this section must submit an application under Section 5.502 that, in addition to complying with that section:

(1) states the volume and quality of the proposed discharge;

(2) explains the measures proposed to minimize the volume and duration of the discharge; and

(3) explains the measures proposed to maximize the waste treatment efficiency of units not taken out of service or facilities provided for interim use.