More rain will hit northern Victorian towns at risk of flooding, with as much as 30mm expected to fall, possibly pushing swollen rivers to major flood levels.
The Bureau of Meteorology is expecting around 10-20mm to fall across the state from Tuesday morning, with 30mm expected in the north of the state.
Carisbrook, near Maryborough was at risk of major flooding as around 59mm of rain fell in a short period overnight on Monday.
Residents were doorknocked at 3am as river levels began rising rapidly, but the rain eased later in the day, saving homes from inundation.
While not as much rain is forecast for Tuesday, BoM is keeping an eye on already swollen rivers.
"Most of the time the ground would just soak it up, but because we've had such a wet month, even that much is doing a lot at the moment," senior forecaster Stephen King told AAP.
The Avoca River at Charlton is expected to major flood levels (7m) late on Tuesday, and a community meeting will be held in the town to keep residents informed.
The Loddon river is being closely watched, as it remained at major flood levels on Monday evening.
Landslides are also a threat for the Great Ocean Road again, with Vic Roads detecting some movement at Paddy's Path in Wye River over the past four days.
Flood risk for Torrens and Bremer rivers
Authorities have issued warnings to residents that heavy rains have put South Australia's Torrens and Bremer rivers at risk of flooding.
People are being told to prepare their homes for flooding by moving items to a safe place, or leave their homes if safe.
SA Police and the SES have again implored people to stay out of flood waters which may rise rapidly and be fast moving.
The SES says the areas around Langhorne Creek, north of Adelaide, could be seriously affected.
Dermot Barry from the SES told Seven said there had been four hours of heavy rain overnight and that could last for the rest of the morning.
"Overnight we saw that weather come in. We had squally wind start in the catchments and the hills," he said.
"We are monitoring it now and it's a good six or eight hours before this tailwind moves through."
The sodden Adelaide Hills had been braced for at least one last drenching following on from last week's severe weather.
The Onkaparinga River swelled to bursting, and a flood watch and act message was issued, with the towns of Hahndorf, Lobethal, Oakside, Woodside and Verdun most prone to flash flooding.
Both Prime Minister Malcolm Turnbull and Opposition Leader Bill Shorten visited weather-affected areas of South Australia on Monday.
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More rain for flood-hit central west NSW
Residents in flood-battered regional NSW are warned more rain is on the way, with a possible thunderstorm predicted.
Up to 15mm rain is predicted to hit Orange and surrounding areas on Tuesday, with the inflow to swell the Lachlan River in nearby Forbes, already hit by heavy flooding.
The Bureau of Meteorology says while Forbes will only receive 2-3mm rain on Tuesday, the swelling of the Lachlan River will prolong flooding.
"There will also likely be a couple of thunderstorms south of Forbes (on Tuesday), but we could see a thunderstorm in that area," BoM spokeswoman Sarah Chadwick told AAP.
The BoM expects the Lachlan River at Condobolin to peak at 7.2 metres on Wednesday, the highest level since 1990.
The river peaked close to 10m at Nanami, southeast of Forbes, while major flooding continues at Jemalong, where the river reached 7.96m on Monday.
Tasmania farmers battling with flood clean-up
Federal Labor politicians will tour parts of flood-affected northern Tasmania talking with farmers who are being held up by bureaucratic red tape as they battle to clean up their land.
Opposition environment and water spokesman Tony Burke will on Tuesday visit the centre of Latrobe where landowners are still reeling from devastating floods in June that destroyed fences, ruined irrigation systems, and left riverbed silt across paddocks.
Labor MP Justine Keay wants local, state and federal governments to work together to remove the legislative hurdles so farmers can clean up and get back to work.
Recent rains have again sparked a flood warning for the nearby Mersey River.
