Drivers battled their way through waterlogged roads on Thursday morning after torrential rainfall hit much of London and the South East.
A number of roads, train routes and underground services have been partly closed due to the flash floods, as parts of the capital saw more than half a month's worth of rainfall in one night.
The London Fire Brigade said it was called to 45 flooding related incidents overnight, including rescuing drivers who were stuck in their cars, and evacuating people whose homes had flooded.
It urged drivers not to drive through floodwater and asked them to read its advice on what to do if their street starts flooding.
Spray and flooding on roads could lengthen journey times, said the Met Office, which has issued a yellow weather warning for rain, covering the South of England from Portsmouth to Canterbury and parts of London.
The warning remains in place until 3pm on Thursday, but a separate yellow warning for thunderstorms covering much of the South of England runs until 6am Friday.
The Met Office said the top rainfall totals recorded in the 12 hours from 9pm on Wednesday until 8am on Thursday were at Kew Gardens in west London, where 42.2mm fell, and Odiham in Hampshire, where 40.2mm fell.
The weather service said the average rainfall for the entire month of November in Greater London is 69.3mm and in Hampshire is 104.65mm.
It came after Storm Claudio travelled from France to the UK on Tuesday, hitting parts of the country with winds of around 70mph.
Transport for London said there were severe delays between Stratford and Richmond/Clapham Junction caused by flooding on Thursday morning.
Meanwhile a signal failure caused by flooding at Richmond and Acton Town led to no District Line service between Earl’s Court and Richmond/Ealing Broadway.
South Western Railway said that flooding had blocked lines between Fulwell and Hampton, leading to cancellations and delays.
Kent County Council warned people to “be careful out there” after it had multiple reports of weather-related issues across its road network due to “strong winds and heavy rain”.