The thunderstorms followed a week of high temperatures in the capital
Motorists had to be rescued by emergency services after heavy rain left roads flooded in parts of London.
Roads in parts of the south and east of the city were submerged in rain amid post-heatwave thunderstorms.
A number of motorists had to even abandon their cars on main roads as they became half submerged in the deluge, and the rain became heavier as the afternoon wore on.
The affected roads were in Clapham and Camberwell, as well as Kingston and Worcester Park in south-west London, and Walthamstow in north-east London.
In Worcester Park, Sutton, a man is seen walking through flood water that reaches his mid-thigh – in a photo posted to Twitter.
Other images show cars almost submerged in the water that collected in dips in the road, mainly under bridges.
London Fire Brigade said that they have taken at least 130 calls from those areas concerning flooding on roads and in basements.
Images of extreme flooding in east and north-east London were also posted on social media.
Cars half-submerged by floods under a bridge were stranded by the drivers on the A406 near the Walthamstow turnoff, according to photos posted on Twitter.
Homes and businesses were also affected by the floods, with one restaurant owner in Woodford, east London, reportedly saying that it was the worst flooding he had ever seen in the capital.
Amber warnings for thunderstorms have been issued for this weekend by the Met Office.
The meteologists warned that southern and central parts of England and Wales would see flash flooding.
Two flood warnings are currently in place for Worcester Park and nearby West Barnes, due to the flooding of the river Beverley Brook.
“River levels have risen as a result of localised thunderstorms,” the government’s Environment Agency said.
It follows high temperatures seen across the UK earlier this week, with the hottest day since records began in Northern Ireland of 31.4C. England saw a high of 32C during the hottest day of the year so far on Tuesday 20 Julie.
The thunderstorms spell the end of the hot weather and the beginning of cooler temperatures across the UK.
Southern England will see heavy showers and thunderstorms continuing throughout Sunday, while many other areas in the north will be “dry with plenty of sunshine,” according to Met Office.
Monday will be cloudy with sunny spells, and scattered showers.
Spells of heavier rain, with a risk of hail and thunder, is expected from Tuesday until the end of the week.
The Met Office has predicted that “above average” temperatures will make a return from about mid-August.