This week's heavy rainfall has led to the closure of several shellfishing areas around Long Island, the state Department of Environmental Conservation announced on Thursday.

The closures, in seven towns, were made in response to heavy rainfall on Wednesday and Thursday. Stormwater runoff can carry toxic bacteria and pathogens into waterways, which can make the shellfish harvested in those areas unsafe to eat.

The DEC said it plans to test samples of the water over the next few days to determine when it is safe to reopen the areas.

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The areas that are closed to shellfishing are in the towns of Hempstead, Oyster Bay, North Hempstead, Babylon, Islip, Brookhaven and Huntington.

For information on the specific shellfishing spots closed in each town, call the DEC's hotline at 631-444-0480 or the DEC's office during normal business hours at 631-444-0492. Information about the closures also can be found on the agency's website,