"It has been disappointing and frustrating to see people on the dunes during the event, causing further erosion. "People need to stay right away from the dunes during this severe weather event," Mr Holloway said. "Further coastal erosion is expected, with high tides to continue for the rest of the week." Mr Holloway said staff had been on standby to perform another beach scraping at Belongil Creek. But the creek opened naturally during high tide this morning. The tide is next expected to peak at 9.45am Tuesday. A Bureau of Meteorology Flood Watch remains in place for the Northern Rivers, with minor flooding forecasted at Billinudgel and Mullumbimby this evening, as a result of renewed river rises and heavy rainfall.