Rainwater was seen filling many streets in the capital and overflowing into Tube stations after almost three inches of torrential rain fell in just 90 minutes.
The Circle line was suspended due to flooding on the track near Royal Oak, along with five sections of the District line and London Overground.
Services from Turnham Green to Richmond, Earl’s Court to Edgware Road and Earl’s Court to South Kensington were halted while engineers fix signalling problems caused when Gunnersbury station in Chiswick was flooded.
Overground trains from Camden Road to Richmond and Euston to Kilburn High Road have been stopped while infrastructure damaged by flooding is repaired.
Meanwhile the Hammersmith & City line was suffering severe delays due to the flooding at Royal Oak.
Passengers have been urged to check the latest travel information before setting off.
Network Rail said engineers had worked ‘through the night’ to clear flood water and carry out inspections and repairs.
Its overground train services were marred by delays and cancellations due to trains and crews being ‘out of place’.
Several major stations including Euston had to be closed on Monday evening and have reopened on Tuesday morning albeit with delays and cancellations to outbound trains.
A spokesperson for TfL said: ‘Due to the weather last night, there has been significant flooding in different areas across the capital, which has had an impact on our services across the transport network.
‘We apologise to our customers for any disruption and are working hard to minimise the impact to our services.
‘With some bus routes on diversion and Tube and Rail services affected, we strongly advise that customers check for the latest information before they travel to ensure they have a safe and smooth journey.’
Network Rail added: ‘Yesterday, heavy rain flooded the railway lines at London Euston. Consequently, trains were unable to run to / from the station. However, lines between London Euston and Watford Junction have now reopened for Avanti West Coast, Caledonian Sleeper and London Northwestern Railway services.
‘Avanti West Coast and London Northwestern Railway trains to and from London Euston may be subject to short notice cancellations or delays of up to 30 minutes until approximately 9am.
‘London Overground services are still unable to run between London Euston and Kilburn High Road.’
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