10 February, 2020
The state weather agency said 391.6mm of rain had fallen in the past four days, warning of potentially life-threatening flash floods.
Emergency services advised people in Sydney to stay at home on Monday because of disruption to transport.
Tens of thousands of people have also been left without power.
Amid the chaos, there is also relief that the rains have extinguished many of the bushfires which have torn through New South Wales in recent months.
Despite the fire relief, the Bureau of Meteorology (BoM) warned that fire-hit areas can be particularly prone to flooding, and that fast-moving waters can carry large amounts of debris.
A severe weather warning is now in place for the entire coast of NSW, Australia’s most populous state.
Government agencies have warned that high tides forecast for the coming days could worsen flooding in many areas.
In Sydney alone, at least 200 people were rescued by emergency services.
Emergency services are searching for one man believed to have been swept off a bridge in his car.
“Everywhere has been hit, it’s hard to pinpoint where it’s worst,” said Matt Kirby, spokesman for the State Emergency Services (SES).
Thousands of people in low-lying areas of the city have been told to leave or get ready to leave their homes.
The northern beaches area of Sydney has already seen significant damage, with several metres of beach being washed away in places.
The massive rainfall has also replenished reservoirs in the region, which has been battling years of drought.
The Warragamba Dam, outside Sydney, is heading towards being 70% full, say officials. At the end of last week it was at only 42%.