Londoners have been warned to keep away from floodwater as it may be “mixed with raw sewage from overloaded sewers”. Shocking footage from Hackney Wick in east London showed a man kayaking through a flooded courtyard to reach a road.
Another showed someone using a plank of wood to kayak around a car park submerged in water.
And a video shot by a passenger at Pudding Mill Lane DLR station near Stratford in east London showed floodwater pouring in and quickly rising up steps.
Social media users urged people not to wade through the floods as the rainwater could be mixed with untreated sewage.
One man tweeted: “Reminder, in urban areas floodwater is almost always mixed with raw sewage from overloaded sewers, especially in London where the Thames Tideway scheme to boost capacity is not completed.
“So essentially, don’t touch floodwater.”
He added: “I know this makes me a killjoy but also the water is opaque and full of obstacles, you really really do not want to cut yourself in an open sewer.”
Parts of Gants Hill station on the Central Line was also flooded following the huge downpours this afternoon.
The Metropolitan Police have warned drivers there will be “severe disruption” on the North Circular this evening.
READ MORE: UK floods: Cars stranded as firemen struggle through water up to knees
It was one of eight stations across London which Transport for London closed due to wet weather.
Other videos shot by drivers and car passengers showed vehicles driving along flooded streets in Leyton and Walthamstow.
And in Stratford Shopping Centre stunned shoppers looked on as security guards tried to mop up the floods.
The water appeared to have entered multiple stores after making its way down a corridor.
Photos showed part of the centre cordoned off.
A passerby captured the dramatic moment people strangers worked together to push cars out of a flooded Cranbrook Road in Ilford, East London.
The Met Office has issued an amber warning for storms covering London and some of the Home Counties where buildings are at risk of flooding, lasting until 7pm on Sunday.
A yellow warning for storms which could cause travel and power disruption also covers a wider area of the south from Norwich to Plymouth, and lasts until midnight.
Met Office meteorologist Steven Keates said parts of the south between south Suffolk and the Isle of Wight could be deluged by 100mm of rain in just a few hours on Sunday evening.
He warned: “There’s torrential thunderstorms around yet again.
“Into the evening, from Norfolk to Bournemouth we are going to see some pretty lively showers.
“Torrential downpours, thunder and lightning and potentially some hailstones are settling in the south.”
The Environment Agency has issued two flood warnings for areas in London near Beverley Brook in Worcester Park and West Barnes.