Your property may be flooded, you could become isolated (surrounded by floodwater), access to other areas might be cut and you could lose your power, water supply and other low-lying infrastructure such as sewerage. Remaining in your home/business when it is flood affected can be dangerous. It is essential that residents and businesses have an emergency plan that is designed to allow stock and belongings to be raised or relocated and to evacuate in time if required. It is important that people who may be affected by flooding be “weather aware” and “flood aware”. Very heavy rain can cause flash flooding in the CBD Basin without riverine flooding occurring. The Lismore CBD has the added risk of being affected by flash flooding in the CBD Basin. Businesses were inundated with floodwater. However in 2017, floodwater reached 11.59m and overtopped the levee wall for the first time since the levee was built. The 2017 flood peaked at 11.59m and is believed to be the 6th highest in Lismore.Ī levee was built in 2005 to protect the CBD in a 1:10 event and it has protected the town many times since. Of these events there have been 33 major, 51 moderate and 56 minor floods. Since 1850 there have been 150 flood events, ranging from low level nuisance rises to high level, very disruptive and destructive events. Lismore is one of the most flood prone urban centres in Australia.
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