* Air conditioning of buildings using Lincoln Water System sources is strictly prohibited.

In general, the restrictions ask for common-sense use of water until the system stabilizes.

Beutler said the city will continue to monitor the situation around the clock, and would tighten or loosen restrictions as warranted.

Officials stressed that water contamination is not a concern, as all of Lincoln's water is drawn from the aquifer 80 feet below the surface and the city's two treatment facilities are operational. The issues are the wells themselves, the mains that carry the water and power sources in the flood-ravaged area.

Crews are working around the clock to monitor the situation but their opportunity to inspect the wellfields, check out the water lines and restore power depends on water in the river receding, officials said.

The city of Lincoln operates more than 40 wells along the Platte, at least one of which was damaged by floodwaters and others taken offline because of the power issues.

Officials said water usage on Sunday likely drew down the city's 100 million-gallon tanks to 60 million to 70 million gallons in reserve within the city limits, with another 10 million gallons of water in reserve in Ashland.