Commuters faced a morning of disruption on Tuesday as torrential rain continues to lash the South East.
On Monday evening, heavy flooding in Kent closed all lines through Orpington railway station for several hours, while police shut a section of the M25 overnight after discovering two sinkholes on the central reservation.
The motorway was closed in both directions but Highways England said the sink holes had been repaired and the road reopened by around 6am.
But motorists faced further delays after the M25 was closed in both directions between junctions three and four due to an incident, Kent Police said.
National Rail has also warned that Southern and Thameslink trains will be heavily impacted during the morning commute, with some services delayed or cancelled due to flooding.
The Environment Agency has issued three flood warnings in south-east England, for the River Wandle at Morden, south London, the Emm Brook at Wokingham and Ravensbourne at Bromley.
Residents are being told to avoid low-lying footpaths near local watercourses and plan driving routes to avoid low-lying roads near rivers which may be flooded.