Trees have been knocked down in chaotic scenes across Sydney as a fast-moving, severe storm hits.

The storm hit Hornsby, Parramatta, Sutherland, Sydney Olympic Park, Richmond, Liverpool and Sydney Airport by about 1pm, while Mona Vale and waters off Bondi Beach were hit moments later.

Most #storms have moved through #Sydney and action is moving further north to #CentralCoast and #Hunter. Lots of wind gusts recorded across the basin. See latest at https://t.co/Ss766eSCrL and the radar at https://t.co/Ss766eSCrL pic.twitter.com/UpRae7mfOH

— Bureau of Meteorology, New South Wales (@BOM_NSW) November 26, 2019

More than 70,000 homes and businesses across Sydney have been left without power while trains on the North Shore and Western line were blocked by a fallen tree between Gordon and Lindfield.

STORM | This video was sent to us from Gordon where “hundreds of trees” have been torn down by high winds. pic.twitter.com/Z6NvBlUQiU

— 2GB 873 (@2GB873) November 26, 2019

A caller has told Steve Price tin roofs are flying off at Pymble as the storm hits.

Ray Hadley tells Steve the scene at Gordon is chaotic.

“I can’t describe how many trees are down, there’s hundreds and hundreds of trees.”

Click PLAY below to hear the full interview

Caller Michael has sent in a photo of a tree which hit power lines in Ingleburn with power lost as a “hurricane-like storm” hits the city.

Listener Dom has sent in a photo of fallen down trees on Forest Way at Sydney’s north.

Emergency crews are working to restore power to 25,000 customers after severe storms swept across Western Sydney & caused 190 electrical hazards, Power is currently out to all customers supplied from major substations at Macquarie Fields & Wisemans Ferry. Further updates to come. pic.twitter.com/K6hKl1HAA4

— Endeavour Energy (@endeavourenergy) November 26, 2019

Listeners have sent in photos of the impact of the storm around the city.