Motorists rescued from flooded roads as deluge hits SA

Many roads were closed and more than 2000 properties were blacked out at the height of the deluge from Thursday night until Friday morning.

The South Australia State Emergency Service responded to more than 250 calls for assistance with some properties inundated and roads closed as rivers and creeks surged.

A warning was issued for a dam at Lenswood which had spilled over, causing concern for nearby properties.

A number of motorists were caught out trying to drive through rising water.

SES chief of staff Derren Halleday said in such conditions motorists needed to heed the dangers of trying their luck.

"On Thursday evening emergency service crews responded to seven swift water rescues, with some jobs including more than one vehicle,'' he said.

"This is an incredibly high number in such a short time."

The Bureau of Meteorology said rainfall totals ranged from about 40mm in Adelaide to close to 100mm in some locations in the hills.

The weather system moved across Victoria on Friday and authorities reported 49 calls for assistance, including 31 trees down.

SES units were busiest in Brimbank, west of Melbourne, and Bendigo.

By Friday afternoon, conditions had cleared in South Australia and flooding and river levels had eased.

The bureau forecast more rain over the weekend, with Adelaide tipped to have up to 5mm on Saturday and another 10mm on Sunday.

It also issued a severe weather warning for damaging winds across the Mt Lofty Ranges and down the Fleurieu Peninsula, where gusts of up to 90km/h were likely.

Mr Halleday urged motorists to take care.

"Floodwaters disguise the road, including potholes, and submerged obstacles such as large branches or parts of the road which have been washed away," he said.

"At night, when vision is poor due to rain, water across a road can be difficult to recognise."

Australian Associated Press