A spokeswoman for South West Trains said:
"We would like to apologise for the disruption our customers will face on their journeys home tonight.
As a result of emergency engineering work to fix a track defect, we are unable to use four platforms at Waterloo which is having a serious impact on the services we can deliver.
Because of that we will have to run an amended timetable for the rest of the day.
Safety is our absolute priority. We have no choice but to make sure these repairs are carried out before we can restore train services. We expect to run a normal service from tomorrow morning. We would like to apologise again to our customers for this and thank them for their patience"
More top news
Sunday will be dry with some long spells of sunshine across the region, but feeling colder in the easterly breeze.
Chelsea Football Club has "apologised profusely" to Gary Johnson who was sexually abused and "suffered unacceptably" as a youth team player.
A man has been jailed after his victim was found slumped in a car with stab wounds in east London.