Emergency crews and firefighters have performed more than a dozen floodwater rescues and have received more than 1100 calls for help.
Flights were cancelled, railway lines closed and motorists stranded on flooded roads as a month's worth of rain fell on Sydney early Wednesday, leaving emergency services battling to respond.
Severe thunderstorms and heavy rainfall lashed Australia's largest city, with the local Bureau of Meteorology reporting more than 106 millimetres of rain fell in some places within a few hours.
The city's airport, the country's busiest, said it cancelled at least 20 flights after closing two of its three runways.
The two officers were injured while helping clear vehicles trapped on a flooded road in North Ryde. A female probationary constable suffered a suspected broken leg, while a male leading senior constable sustained minor injuries.
Her partner is being assessed for a possible concussion.
In some places, the storm has already surpassed monthly rainfall expectations: the Observatory Hill weather station already notched almost 85mm of rainfall before 7am, surpassing the November average of 83.8mm.
West Pennant Hills recorded a whopping 72.5mm from 5:30am to 6:30am.
The weather has impacted more than just our roads, with Sydney Airport ceasing all operations briefly. About 90 domestic flights and four worldwide flights were cancelled, with passengers urged to contact their airlines for more details.
The vast majority of trains are operating, despite delays, and occasional flash flooding.
A fireman sits on a road holding a hose that is pumping water out of a residential block after it flooded due to heavy rain in Sydney, Australia, Nov. 28, 2018.
Police are urging people take care in the "horrendous weather conditions". Parramatta River ferries are not working between Parramatta and Sydney Olympic Park and have been replaced by buses.
The Woolworths supermarket at at Town Hall was forced to close after water began pouring through the walls and roof.
The BOM said the storms would last through most of the day before easing, with gale force winds whipping up four metre (12 feet) waves which are expected to pound Sydney's beaches.
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