Wis. Stat. § 196.70: Temporary alteration or suspension of rates.

(1) The commission, when it deems necessary to prevent injury to the business or interests of the people or any public utility in case of any emergency to be judged of by the commission, may by order temporarily alter, amend, or with the consent of the public utility concerned, suspend any existing rates, schedules and order relating to or affecting any public utility or part of any public utility.

(2) The commission may direct an order under sub. (1) to part of a public utility or to one or more public utilities and may prescribe when the order takes effect and for how long the order shall be in effect.