Where is the water?

Part of Kuching was left waterless for 14 hours yesterday, This was due to some mishaps at the construction site near Jalan Song where the Water Main to the prime are was knocked out by an excavator. Any attempt of calling to Kuching Water board hotline was met with an engage tone. Water Tanker was only sent at 10:25pm, Areas affected are

– Taman Hui Sing
– Tabuan Height
– Mabel Garden
– Kenny Hill
– Jalan Tun Jugah

We have Electricity Grid system, Why we could not have a Water supply network that can isolate and divert flow in case of outage?