Those out in Coney Island today for the all-day Coney Island Bordwalk Party may have jumped the gun by wearing their swim trunks. The Parks Department closed off the water in Coney due to possible raw sewage overflow from a local treatment plant. Nearby Manhattan Beach was also shut down for the same reason, but both beaches remain open to sunbathers. Earlier in the weekend, Nassau County had shut down 22 beaches because of the heavy rain on Friday and yesterday it was revealed that a sizable chunk of Robert Moses State Park would have to close down due to erosion.