The city shall not be liable for any deficiency or failure in the supply of water to consumers, whether occasioned by shutting the water off for the purpose of making repairs or connections or from any other cause whatsoever. In case of fire, or alarm of fire, or in making repairs of construction of new works, water may be shut off without notice at any time and kept off as long as necessary. In addition, the City Council shall have the right to impose reasonable restrictions on the use of the city water system in emergency situations. For non-payment of charges, water service may be discontinued according to the procedures established in § 51.72.