Is This a Good Idea?

My plan is to hook pipes to go into a huge tank to save the water and use it when it is an emergency.

This is a good idea because if we have a huge emergency and we don’t have any water at all then we can use the tank for water. Another reason why is because while we are using all of the water we need some to save.So that’s why my plan is important. Do you think it’s important to save water?