Rain, leaders hit SA in storm finale

Rick Goodman

Heavy rain, Malcolm Turnbull and Bill Shorten have all dropped in on South Australia but fortunately, it looks like the deluge will be over soon.

In the aftermath of last week's severe weather, the sodden Adelaide Hills braced for one last drenching on Monday night.

As the Onkaparinga River swelled to bursting, authorities urged those in at-risk areas to sandbag their homes and get out their flood plans.

A flood watch and act message was issued, with the towns of Hahndorf, Lobethal, Oakside, Woodside and Verdun most prone to flash flooding.

"We're asking people in that area to make preparations and put their emergency flood plan in place," a State Emergency Service spokeswoman said.

"Put sandbagging in place, move valuables to a safer place, and monitor the media for updates."

Meanwhile the state was also inundated by Australia's political leaders.

Prime Minister Malcolm Turnbull and Opposition Leader Bill Shorten flew into Adelaide on Monday to offer their support and thanks and admiration.

"I just want to say how much I admire your resilience," Mr Turnbull said.

"And how much I admire the way in which the community pulls together."

He also paid tribute to the volunteers and emergency workers from the SES, the Country Fire Service and the Australian Defence Force.

Earlier Mr Shorten expressed a similar message. "To the volunteers and indeed the full-time staff in SA - you're doing a great job," he said.

"The literally thousands of people who are outside getting wet, doing the swift river rescues, blocking off the roads, making sure that families are able to cope.

"I have to say you all make us a little bit more proud to be Australian this morning."

North of Adelaide, where serious flooding had earlier occurred, the situation improved with the Gawler River receding.

But the roads remained dangerous, particularly for those returning from long weekend trips north, including to the Yorke Peninsula.

An eight-year-old girl was killed in a two-car crash in Stockwell in the Barossa Valley on Sunday afternoon, with a Victorian man being charged.

"There's been some horrific accidents over the last 24 hours," SES chief officer Chris Beattie said.

"I want to encourage everyone to drive to the conditions, be patient with one another and get home safely."

Mr Beattie said there had been too many drivers who had attempted to drive through floodwaters despite warnings against doing so.

"One of our great frustrations has been the behaviour of drivers who tackle flooded roads and bridges," he said.

But he said drivers had finally heeded the message, with no floodwater rescues needed on Monday.

Relief from the severe weather in SA is at last on the way.

The rain is predicted to clear on Tuesday and stay away for the remainder of the week, with tops of 27C forecast on Thursday and Friday in Adelaide.

"We've got an unusual warm spell after this long spell of rain and cool weather," Bureau of Meteorology's SA director John Nairn said

But he said the broader climatic condition that is behind the wet weather - a negative Indian Ocean dipole - is likely to remain through October.

"We know that we can still get wet periods and we have to be ready for that through the coming month."