Flooding around the state
SA weather: Clare flooding as waters rise statewide ahead of worsening conditions
The town of Clare in South Australia's mid north has been affected by flooding in wake of the Hutt River bursting its banks and a dam threatens to flood nearby Auburn.
Police said the township and caravan park had been impacted and urged people living or travelling through the region to closely monitor conditions.
Follow our blog for the latest developments in the unfolding SA weather event.
Patrick, who lives just north of Clare, told 891 ABC Adelaide the Hutt River had burst its banks and was running over the over Horrocks Highway.
"I see the police are there and I'm about a kilometre from where it has burst and the river is busy running down my driveway at the moment," he said.
Clare Valley Winemakers chief executive Tanya Matz said "patches of roads" in the region had been washed away, including at nearby Penwortham.
She said she drove to Clare earlier today and "pretty much everything is closed" with a local creek flowing fast.
Ms Matz said vans at the caravan park had been moved to higher ground at the showgrounds.
"We have sandbags on one side of the tourism centre, ready to sandbag the caravan park if required," she said.
The State Emergency Service (SES) warned a dam was threatening to burst in nearby Auburn, which could flood properties and roads in the town.
"SES advises residents of the warning area that floodwaters may rise rapidly and are likely to be fast moving," it said.
"You should never walk, ride or drive through floodwater or allow children to play in or near floodwaters.
Flood warnings issued as more wild conditions loom
A flood warning has been issued for a number of rivers across South Australia as the Bureau of Meteorology (BoM) warns waters are rising rapidly.
This includes the Light and Wakefield rivers in the Mid North, where waters are rising and are expected to remain high Thursday and Friday.
The bureau said the Wakefield River at Rhynie was the highest it had been since September 2010 and further rises were expected.
Water levels in the Angas and Bremer rivers in the eastern Mount Lofty Ranges had also "risen rapidly ... in response to rainfall in the last 24 hours", the bureau said.
"Rainfalls in excess of 60 millimetres have been recorded in the 24 hours to 11:00am Thursday in the Bremer and Angas catchments."
Further falls of 40 to 80mm are possible this afternoon and into Friday morning, it said.
BoM said flooding could occur along both rivers, particularly downstream of Willyaroo and Wanstead Road and Lanhorne Creek.
Police have also reportedly been doorknocking residents at Glenelg in Adelaide warning that houses along the Patawalonga could also face flooding in coming hours.
The state is bracing itself for a third wave of strong winds and heavy rain that is due to arrive later this afternoon.
It is associated with an intense low pressure system that has been battering the state since Wednesday.
PHOTO: Police have blocked off the entry to Morialta Conservation Park due to flooding. (SA Police)
Dam bursts in the Barossa Valley
Police said a dam north of Greenock in the Barossa Valley had burst and could cause the flooding of properties and roads in the township.
"People in the Greenock area are urged to closely monitor local conditions for the risk of flooding," police said.
"SES advises residents of the warning area that floodwaters may rise rapidly and are likely to be fast-moving."
BoM said there was a moderate flood warning for the Onkaparinga River in the Adelaide Hills and south of Adelaide, which caused widespread flooding two weeks ago.
Brown Hill Creek is also flowing over roads in Torrens Park in Adelaide's south, while Gorge Road in the city's east is closed from Corskcrew to Torrens Hill road.
PHOTO: Brown Hill Creek flows over the road at Torrens Park as stormwater rushes through the system. (ABC News: Andrew Burch)
The River Torrens Linear Park has also been closed.
A severe weather warning remains in place across large areas of the state, from the Eyre Peninsula, the Mid North and Yorke Peninusla, the northern pastoral districts, Adelaide, Kangaroo Island and the Fleurieu Peninsula.
It said strong to gale-force winds were occurring over the area with damaging winds forecast to reach 50 to 75 kilometres per hour, with gusts of up to 120kph.
"The conditions will cause sea levels to be significantly higher than indicated on the tide tables today," BoM said.
"Sea levels along the parts of Spencer Gulf and Gulf of Saint Vincent coastlines are likely to be about one metre higher than the highest tide of the year."The bureau said sea levels were expected to reach between 4.3 and 3.8 metres at Outer Harbor in Adelaide's south, which "could cause sea water flooding of low lying areas".
Tens of thousands of properties across South Australia are without power due to ongoing outages.
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