A torrential rain storm is lashing Sydney, causing chaos for commuters on roads and public transport, and significant delays at the airport.

The Bureau of Meteorology (BoM) has reported heavy rainfall in the northern parts of the city, with Mosman recording 118 millimetres of rain since 5am.

Up to 100 millimetres of rain has fallen in the Sydney CBD, but Zhi-weng Chua, a BoM duty forecaster, says we can expect up to 200 millimetres of rain in the city hub. “That’s equivalent to two months’ worth of rainfall for November,” he told Broadsheet.

Lewisham train station was closed this morning due to water inundating its underground concourse, but is now open. And earlier this morning trains between Campsie and Sydenham were suspended due to flooding on the tracks. Train services have since resumed, but there are widespread delays across the T1, T2, T3 and T8 lines.

At Town Hall station, rain has broken through the roof at the western concourse, closing three main ticket barriers at the busy station. There is a lift or escalator outage at Seven Hills, Sydenham, Marrickville, Helensburgh and Artarmon.

Woolworths at Town Hall has closed due to safety concerns, after water leaked into the supermarket this morning.

At Sydney Airport, two out of three runways have closed, with delays and cancellations disrupting domestic and international flights. O’Riordan Street (between Robey Street and Qantas Drive) in Mascot – a major arterial road leading to the airport – has closed due to flooding and a fallen tree. Motorists are advised to detour at King Street.

The State Emergency Service (SES) has received six rescue requests from motorists trapped in flood waters in Marrickville, West Ryde, Silverwater, Macquarie Park and West Pymble. The SES warns drivers to avoid entering flooded roads because water levels are difficult to judge, and vehicles can quickly become inundated with water.

And while the national forecaster expects rains and storms to decrease during the day, it’s the strong winds that will make the evening commute a struggle.

“From early afternoon onwards, we do expect them to pick up, with potentially gale-force winds by night. They have an expected mean wind speed of 60 to 70 kilometres per hour,” says Chua.