Incredible footage as Sydney hit by massive storms

Major flooding is continuing to torment large parts of eastern New South Wales and incredible vision shows the situation as it worsens particularly in Sydney.

Footage shot inside a classroom at Mackellar Girls Campus in Manly Vale shows an extraordinary height of water outside and cars appearing to float down the street.

There has been more dramatic flooding elsewhere across the city and around the state, with water rapidly rising and swallowing roads, cars, bridges and houses. Playgrounds and caravan parks are also underwater.

Tap on the video at the top of this article for the latest storm videos.

LIVE UPDATES: Sydney hit by major flash flooding

SUBMIT YOUR WEATHER PICTURES AND VIDEOS HERE

There have been more than a dozen evacuation orders for suburbs across Sydney, impacting about 20,000 people.

Weatherzone's Ben Domensino said the current wet weather was unprecedented.

"Sydney's year-to-date rainfall is an extreme outlier compared to historical observations," he said.

Sydney's Northern Beaches area was the latest to be inundated, with floodwaters quickly rising in Freshwater, Brookvale, Manly, Curl Curl and surrounding suburbs.

Premier Dominic Perrottet has warned residents to following evacuation orders and advice from emergency services.

"Please follow the instructions of the SES."

READ MORE: Evacuation warning on Sydney's Northern Beaches as Manly Dam threatens to spill