Dozens of Gerringong residents were assessing the damage to homes on Sunday, after flash flooding ripped through many parts of the coastal town the day before.
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SES media officer Dave Rankine said they had received 419 requests for assistance across the Illawarra and South Coast in the 48 hours to 9am Sunday.
This included 11 flood rescues, 205 "flood requests" (such as help with sandbags), and 192 storm related call out (such as trees down).
He said around 50 Gerringong residents were counted in the flood assistance, due to "blocked up drains" sending water through people's homes in a number of streets.
The Bureau of Meteorology has forecast the rain to ease over late Sunday and Monday for the Illawarra.
Flooding is expected in parts of the Shoalhaven and South Coast: around Nowra, Sussex Inlet, Terara and Island Point on Sunday and Monday.
On Sunday, Gerringong couple Bernie and Hazel Gardner returned to their house to where a "torrent" of flood water was nearly knee deep 24 hours before.
Mr Gardner said he could see the "tide line" on the front door to their single story house, though "debris stopped a lot of the water getting in".
The pair have lived on Craig Place for more than 20 years and only once in 1998 had to deal with flash flooding, but said it was nothing to this scale.
"It was like a torrent," Mr Gardner said of Saturday morning's drama.
"One minute I was looking out the door, and I thought 'oh we got through this quite well'; and then the water just came and it was a foot deep ... it just went through everything."
The couple are thankful their insurance company acted quickly and sent people to help dry out their abode the same evening, though others weren't so lucky.
"I've just driven down the street and one poor [man] had all his carpets out the front," Mr Gardner said.
"A neighbour at the back of us, we saw them yesterday packing up their cars ... their insurance had given them 48 hours to get out because of mold."
He said the water gushed "down the hill" and affected residents in Fern Street, Craig Place, Henry Lee Drive, Burnett Street and more.
Meanwhile in a southern corner of Albion Park, Whistler's Run was transformed from a quiet suburban street into an angry, brown river.
Rainfall totals for the 24 hours to 9am Saturday include 159mm at Foxgrounds, 106mm at Port Kembla, 143mm at Broughton Creek and 154mm at Nowra.
Between 9am Friday and 9am Sunday Bellambi recorded a total of 95.8mm, 107.6mm at Albion Park and 264.8mm at Nowra.
Further south, it's unclear whether severe weather was to blame for a fatal collision involving a truck n the Princes Highway north of Batemans Bay.
Police are calling for witnesses or dashcam footage of the incident which was reported in wet conditions about 9am Saturday, between Cullendulla and Durras drives.
The driver of the car died at the scene. A 57-year-old woman and a 66-year-old man were taken to Batemans Bay Hospital, before being transferred to Canberra Hospital.
The woman was understood to be suffering facial injuries and possible chest and lower limb injuries, while the man was understood to have shoulder and chest injuries and leg pain.
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