The Suffolk County Department of Health Services is telling swimmers to stay out of the water at 64 county beaches.

Because of heavy rainfall, the agency is advising against swimming, effective Tuesday. The advisory is likely to be lifted Wednesday, according to a news release from the department.

The advisory is a precautionary measure for beaches known to have substantial storm water runoff caused by heavy rainfall. The runoff can raise bacteria levels so the waters fail to meet the New York State standards for swimming, health officials said.

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Information on Suffolk County beach closings is available by calling the health department's Bathing Beach hotline, 631-852-5822, or by calling the department's Office of Ecology, 631-852-5760.

A list of beach closings is at nwsdy.li/1FkyAWz