Normal text size Very large text size The big wet was just setting in over NSW last month when Colonel Warwick Young received the call. It was Marg Prendergast, executive director of disaster recovery at Resilience NSW. The one in 50-year flood event had only just begun its wrath. Floodwaters in the Hawkesbury River pass under Hawkesbury River Bridge at Mooney Mooney. Credit:Wolter Peeters The army reservist of 30 years recalls: âMarg rang me and said, âWeâre having a meeting. Can you be at it? Just so you are aware of whatâs going on.ââ It was Sunday, March 21, one day before two powerful weather systems would collide over the east coast of NSW, causing widespread chaos, evacuations and the loss of a human life.