All you smartasses forgot that there is almost no containers to fill with water, there is probably a large supply of bottled water/soft drinks, and to a hardcore survivalist (think bear grylls), water is a commodity, not a necessity as he'd be willing to drink his own piss
MC meant that there is going to be sanitation issues as there will be no more showers, as well as lower morale and decrease in likelihood of an extended stay (months to years)