The intense rainfall that lashed Sydney on Wednesday morning has been described as a "one in 100 year event" and it's not over yet.
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".
Two police officers have been injured helping motorists caught in flash flooding as heavy rain causes chaos in Sydney.
The officers were assisting vehicles trapped on Pittwater Road at North Ryde just before 7am when a tree fell on them.
A probationary constable has a suspected broken leg and the other officer is being assessed for possible concussion.
Motorists were warned to stay off roads as more than a month's worth of rain lashed Sydney in just two hours
