"Extraordinary volumes of stormwater runoff carry bacteria and viruses into the creeks, coves, harbors and bays, and may cause shellfish in the affected areas to be hazardous for use as food," state officials said in the release.
Water samples will be collected this week to test for any contamination.
The closed areas are:
Islip and Brookhaven: All of Mount Sinai Harbor and Bellport Bay, as well as the northern portion of Great South Bay, including portions of Nicoll Bay and Patchogue Bay north of the east-west buoy line.
Shellfish harvesters can call 631-444-0480 for updates. For more detailed descriptions of closure areas call the DEC Bureau of Marine resources at 631-444-0475 during normal weekday business hours.