What would you do if you had no Tap water

It really depends on where you are when there is no tap water available. As you could be out in the wild and in need of water so you would go to a river collect some water in something to store it in then boil the water to purify it then let it cool and then drink it.

I would calmly check the breaker panel to verify that the power hadn't simply gone off again. I'd troubleshoot back to the pump, then its suction pipe from the well, then peek at the water level in the well. If the well had run dry, I'd - still calmly - step into my shop and take the stainless-steel buckets down from the high shelf above the Porter-Cable routers and walk across the road with them. I'd step over the guardrail, then walk down the embankment to the Waits River, where I'd fill my buckets and bring them - full - back to the house.