Like New South Wales communities to the north, landslips and fast-moving floodwater from torrential rain have also cut off communities and caused major damage to infrastructure around the Illawarra and South Coast, south of Sydney.
In the past week 350 millimetres of rain fell in Wollongong, 386mm at Kiama, 305mm at Moss Vale, 458mm at Ulladulla, and 464mm at Nowra.
Mount Keira, a landmark of the Illawarra escarpment, has been scarred by the wild weather with a landslip on the southern side of the 463-metre-tall mountain.
In a statement to the ABC the Mt Keira Rural Fire Service said the landslip was one of several along the escarpment.
"We have noticed the scar on Mt Keira from a 2012 land slip has grown in size overnight and have found an enormous amount of mud and debris surrounding our station near the bottom of Mount Keira," it said.
Closer to the Princes Motorway work continues to drain a private dam halfway up Mount Ousley.
Road freight on the South Coast was stopped for several hours yesterday as Transport NSW closed all three lanes of the M1 on Mt Ousley because of concerns about the integrity of the dam.
Wollongong City SES and the local RFS used a network of pipes, hoses, and sandbags to pump thousands of litres of water from the dam.
The local SES has responded to 398 requests for help across Wollongong, Shellharbour, and Dapto.
Kangaroo Valley stranded
The naturally-enclosed Kangaroo Valley has been isolated by multiple landslides.
A landslip also caused the closure of Moss Vale Road on Monday, with the Cambewarra to Fitzroy Falls roads and Kangaroo Valley and Jamberoo Mountains roads also closed.
There has been no postal service, rubbish collection, or power, and access to schools have been impacted, businesses have not been able to operate, and internet services are intermittent.
Some food and medical supplies are being supplied through the SES.
The Shoalhaven Council hopes by the end of Wednesday it may have made the roads safe enough for people to be escorted in and out of the village.
Shoalhaven disaster zone
Moderate flooding is continuing at Nowra and around St Georges Basin, washing through low-lying streets and homes.
The saturated catchment is causing many trees to fall and has left the Shoalhaven Council with a major bill for road repairs.
The council's manager of technical services Craig Exton said the damage was extensive.
"We have crews out on the roads everywhere we can to try and assess the damage to try and fix the damage as fast as they can, but it is going to be a long process."
In the Wingecarribee Shire, the Illawarra Highway is expected to be closed for weeks between Robertson and Moss Vale due to a sinkhole at Burrawang.
In the Wollondilly Shire, the small village of Yerranderie is also expected to be isolated for several weeks because of damaged roads.
Beaches smashed
The storm surges and heavy swells have caused extensive coastal erosion.
Sand cliffs known as "scarping" have been carved along the coastline after local beaches were battered by five-metre swell.
The world's whitest sand at Hyams Beach has a red coat after a dump of red seaweed.
Photographer Jayde Clarke captured the event after the major storms.
Marine biologists said the red seaweed was detached from the sea floor and washed up on the beach.
This seaweed "wrack" will slowly be decomposed by microbes and small macroorganisms, such as small crustaceans, and serve as food to ecological communities on the sandy beaches.
In a spot of good news for the region, after more than a week of living under an evacuation order warning, the CBD of Picton has been given the all clear.
Flood evacuation orders were also lifted for Sussex Inlet and St Georges Basin.
