Residents along the NSW South Coast have been flooded following heavy downpours and damaging winds with a second peak expected to cause further inundation.
The NSW SES has responded to more than 2030 jobs across the state since the downpours started at midnight on Saturday.
Most calls for help have been for water inundation, leaking, damaged roofs, fallen trees and requests for sandbags, with volunteers responding to more than 900 jobs across the Illawarra, South Coast and Southern Highlands.
There have been more than 610 jobs on the Central Coast, mid-north coast and northern NSW as well as 430 in Sydney and the Blue Mountains.
Two people had to be rescued when a flatbed truck was caught in rising floodwaters overnight on Swamp Road at Kiama.
NSW SES volunteers arrived shortly after 4am on Tuesday and used a raft to access the vehicle.
Torrential rain which caused flooding around Newcastle and the Central Coast moved southward overnight and into Tuesday, bringing challenging conditions on the state's South Coast and in the ACT.
An evacuation order for 20 properties in Sussex Inlet is in place after the St Georges Basin swelled, peaking at 1.1 metres on Tuesday morning.
NSW SES spokeswoman Ilana Pender-Rose told AAP the river is expected to rise to 1.2m, with a high tide to cause a second peak on Tuesday afternoon.
The Bureau of Meteorology said up to 164mm of rain had fallen at Moruya on the South Coast to 9am on Monday, causing river levels to rise.
A minor flood warning is in place in Deua River and St Georges Basin on the South Coast while moderate flooding is forecast along the Wollombi Brook at Bulga in the Hunter region on Tuesday afternoon.
Minor flooding is easing in the Bega River which peaked at 4.6m on Tuesday morning.
Heavy surf is believed to have caused localised damage and coastal erosion south of Wollongong while a hazardous surf warning remains for the area between the south coast and Hunter coast, the bureau said on Tuesday.
Australian Associated Press