My mother told me while growing up in Hong Kong, there was a water shortage at one time and the government had to do "water rationing". In a similar manner to what Mayor Reames is doing, the water to their block was turned on for a couple hours ever four days ( the next block would get water on the next day, then the third, and so on )
During the time the water was turned on, her family would fill up a large 55 gallon barrel they kept in the kitchen plus several 5 gallon buckets and whatever other jug or container they had and stuff like baths and laundry would also be done during that period.
The rest of the time when the water was off, they had to draw from the barrel and each family member (3 sisters and 4 brothers) were allowed roughly 2 gallons each to wash up for the day.