County health officials issued an advisory urging all recreational boaters and swimmers in Rye Harbor, Milton Harbor and Greenhaven in Rye and in Mamaroneck Harbor to avoid Long Island Sound indefinitely.
The advisory comes in the midst of a heat wave.
Swimming is barred at Beach Point Club, Orienta Beach Club, Mamaroneck Beach and Yacht Club. Also Shore Acres Pointe and Harbor Island Park Beach, American Yacht Club, Shenorock Shore Club, Coveleight Club and Greenhaven Association.
The health department will take water samples and advise when it's safe to reopen the beaches.
An underground force main break continues to release sludge near Blind Brook.