One person is dead, two police officers have been injured and almost 130 flights cancelled after a month's worth of rain was dumped on Sydney in just two hours.
A series of thunderstorms battered the NSW coast from Newcastle down to Wollongong on Wednesday morning, causing havoc for commuters and emergency services.
A person was killed in a crash in Thornleigh on the city's upper north shore, while a tree fell on two police officers who were trying to help drivers trapped on a flooded road in North Ryde.
Rob Taggart from the Bureau of Meteorology told the ABC it's the wettest November day since 1984 and the wettest day since April 2015.
With 91mm falling in 90 minutes, Mr Taggart described it as "basically the equivalent of a one in 100 year event".
He predicted the rain would intensify over parts of Sydney early Wednesday afternoon after the mid-morning's "bit of a lull".
