At their peak, the floods isolated around 50,000 people, submerging intersections and street signs in mid-north coast towns and covering cars up to their windshields, after fast-rising waters burst river banks.
Five deaths have been linked to the floods, the latest a man in his 80s whose body was found at a flooded property about 50km from Taree, one of the worst-hit towns, police said. Taree sits along the Manning River more than 300km north of state capital Sydney.
Prime Minister Anthony Albanese said on Saturday that conditions remained critical in flood-affected regions of New South Wales, as clean-up efforts began.
Australia has been hit with increasing extreme weather events that some experts say are the result of climate change. After droughts and devastating bushfires at the end of last decade, frequent floods have wreaked havoc since early 2021.
