A woman's in a critical condition after being hit by a tree and several people had to be rescued from flood waters as torrential rain and thunderstorms lashed Victoria overnight.
The torrential rain has lashed most parts of the state and metropolitan Melbourne, drenching some areas with more than 150mm of rain.
Bureau of Meteorology (BoM) forecaster Andrea Peace said Victorians were experiencing the effects of tropical cyclone activity.
"We have had a lot of moisture moving into the state which was the remnants of ex-cyclone tropical Anthony, that's moved down from central parts," she said.
The worst hit areas overnight in Melbourne were in the southeast, with Lyndhurst receiving 175mm of rain and Dandenong
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157mm.
The SES received 3234 calls for help and 84 people had to be rescued from houses and cars inundated by the floods.
Among the casualties was an English tourist who is in a critical condition after a tree fell on her while she was asleep in a tent at a caravan park in Doncaster just after midnight, in Melbourne's north-east.
The 26-year-old was taken to the Royal Melbourne Hospital with serious head injuries and her 24-year-old sister, who was also in the tent, appears to have suffered a broken collarbone.
A 14-year-old girl was also caught in floodwater at Ashwood on Friday night.
An ambulance spokesman said the girl had slipped into a rain swollen creek and was stranded for 15 minutes before she was rescued.
In northern Victoria, Mildura experienced record rainfall on Friday with 140mm and 100mm of that fell in just two hours. This caused flooding problems across the city.
Flash flooding has also caused the closure of roads throughout the state on Saturday morning, including all roads between Melbourne and Geelong.
VicRoads has an extensive list of roads closed on its website.
