There are delays of up to 30 minutes on Arriva Trains Wales between Cardiff Central and Treherbert, between Barry Island and Aberdare and between Penarth and Rhymney because of a signalling problem at Cardiff Central.
There are delays of up to 45 minutes on Arriva Trains Wales between Newport and Hereford because of a signalling problem between Pontypool and New Inn and Abergavenny.
There's disruption on Arriva Trains Wales between Cardiff Central and Merthyr Tydfil, between Cardiff Central and Aberdare and between Cardiff Central and Ebbw Vale Parkway because of over-running engineering work between Cardiff Central and Rhoose Cardiff International Airport.
Arriva Trains Wales has tweeted this photograph of railway cable which was stolen and set alight, causing disruption to rail services through Radyr, Cardiff this morning.
The service has been suspended on Arriva Trains Wales between Radyr and Cardiff Central because of a signalling problem between Radyr and Cathays.
Arriva Trains Wales services between Porth and Pontypridd have been suspended because of flooding.
There is no estimate for when a normal service will resume.
The Arriva Trains Wales service between Fishguard Harbour and Clarbeston Road has been suspended because of flooding.
There is currently no estimate for when a normal service will resume.
Arriva Trains Wales and First Great Western's service between Camarthen and Llanelli has been suspended due to flooding at Ferryside.