Arriva Trains Wales have announced disruption between Cardiff Central and Bridgend, and between Bridgend and Maesteg due to flooding between Cardiff Central and Pontyclun.
Buses replace trains from Cardiff to Bridgend in that direction only. Buses are also replacing trains between Bridgend and Maesteg. Trains are able to run eastbound towards Cardiff.
Engineers are working to restore services to the Valley Lines after a landslip between Cardiff Central and Cardiff Queen Street last Friday.
The landslip occurred when a retaining wall partially collapsed between the two stations at Cardiff East. Commuters using the local Valley Lines into the stations faced major delays to rail services.
Over the weekend, engineers have been working to restore normal services at both stations, and have rebuilt the collapsed wall.
During the week Network Rail have said they will continue to strengthen the wall before handing back the lines for rail services to resume.
Network Rail has confirmed access to all main line platforms at Cardiff Central Station after yesterday's landslip.
First Great Western are operating full service, including additional services planned for the Olympic Football event in Cardiff this evening.
Passengers are warned that services on the Cardiff Valley lines are still subject to disruption, and Arriva Trains Wales has outlined an amended timetable for the rest of today.
First Great Western have now confirmed that all planned main line services will run as timetabled, but passengers are warned to expect minor delays.
Commuters faced major delays to rail services this morning, following a landslide between Cardiff Central Station and Queen Street Station.
Commuters have experienced disruption to rail services this morning following a landslide between Cardiff Central station and Queen Street Station.
Workers are desperately trying to fix the problem as tens of thousands of people are expected to descend on the Welsh capital this afternoon for the Olympic football Bronze medal match.