CLEVELAND -- Water is starting to flow again in Cuyahoga County, but a boil advisory is in effect until noon Sunday.

Water should be boiled for four minutes before consuming. Residents can also pick up free water. Click here for a list of locations.

Officials said all residents should have water by 7 p.m.

Cleveland Mayor Jane Campbell said that Cleveland Public Power restored power to 23 of its substations this morning. That will get power to the four water pumping stations and water flowing again through the system. The city also has to flush 5,000 miles of pipes before water can start flowing.

Video

Boil Alert Conserve Energy

Communties with the highest elevation will be the last to get water restored. Those areas include Solon, University Heights, Beachwood and North Royalton. Customers are asked to be patient.

Only the lowest portions of Cuyahoga County will have water. Campbell said that the closer you are to the lake, the more likely you are to have water.

Even if you've had water, it could go out at any time.

If you never lost water, your water is fine for drinking.

Nineteen huge water trucks are on standby in Cleveland. The trucks will only be used should the need arise.

There are also 12 water tankers being provided to the city to help with firefighting needs.

Sewage May Be In Lake Erie

Residents are being advised not to swim in Lake Erie due to sewage. Signs will posted at all beaches.

The mayor said that the sewer system has triggers that use electricty and with those off, sewage can flow into the lake.