The wild weather brought more than 20,000 lightning bolts, 90km/h gusts of wind and Adelaide has already received double the average monthly rainfall for December.
Rainfall records were also broken across the Central Eyre and Yorke Peninsula, and the State Emergency Service (SES) confirmed half of outback roads are closed.
Cleve had its wettest December day in more than 75 years after 55mm of rainfall lashed the small agricultural town, according to Weatherzone.
The weir overflowed for the first time in nearly 30 years.
Kimba saw 47mm – the most rain in 61 years, Mount Ive saw 51.2mm after 53 years, Edithburgh saw 36.8mm after 27 years, Noarlunga saw 40mm after 23 years and Minlaton saw 47.8mm after 22 years.
Winds of up to 100km/h also hit parts of the state with residents making more than 900 calls for help to the SES since Friday.
In Marryatville in Adelaide’s east, a 50 tonne gum tree flattened a family home.
Hannah’s father Glynn was inside when the tree came crashing down but was luckily not physically injured.
“I mean it’s pretty devastating, first we’re pretty glad that Dad is OK,” she told 9News.
In nearby Stonyfell, Andrew’s home was also impacted when a neighbouring tree came crashing down on his car and roof.
“It’s your pride and joy your house, we built this house, and it’s just like wow, this is going to be a problem,” he said.
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“When you’ve been hit like this you do worry, is another one going to come down?”
More than 30,000 properties have been impacted by power outages, and some school were closed today.
There are more storms forecast for Adelaide tomorrow, with concerns they could turn severe.
“The immediate threat of heavy rainfall has passed, but the situation will continue to be monitored,” it said this morning.
“Further localised heavy falls are possible with thunderstorms today and warnings will be issued as necessary if severe thunderstorms develop.”
Thrashing winds are expected to continue today in central and southern parts of the state.
Cape Borda has already felt severe gusts of up to 104km/h earlier this morning, followed by Stenhouse Bay with gusts of up to 87 km/h and Cape Willoughby of up to 81 km/h.
South Australia’s SES warned those in the affected areas to travel with caution today.
“Slow down, take care and drive to the conditions of the road,” it said in a statement.
Residents were also advised to move vehicles under cover or away from trees, secure and put away loose items around their property and to stay indoors and away from windows while wind conditions worsen.