To enable the provision of service for which there is an immediate and urgent need to a point or points or within a territory having no carrier service capable of meeting the need, the public utilities commission may, in its discretion and without hearings or other proceedings, grant temporary authority for such service by a water carrier. The temporary authority, unless suspended or revoked for good cause, shall be valid for such time as the commission shall specify, but for no more than a period of one hundred twenty days for any one immediate and urgent need.