A number of flood alerts have been issued across Wales with heavy rain expected overnight, with flooding "expected". A weather warning has been issued for parts of south Wales from Saturday night lasting until Sunday morning.

Spells of heavy rain are expected overnight according to the Met Office, which has predicted between 20-50mm of rainfall. The warning is in place from 9pm on Saturday until 6am on Sunday and covers the following areas of Wales; Blaenau Gwent, Bridgend, Caerphilly, Carmarthenshire, Merthyr Tydfil, Neath Port Talbot, Powys, Rhondda Cynon Taf and Swansea.

With that warning in place, a host of flood alerts have now been issued for parts of Wales which could flood overnight. The bad weather is likely to bring surface water flooding and transport disruption overnight and early Sunday morning. For the latest Welsh news delivered to your inbox sign up to our newsletter.

Natural Resources Wales says: "A period of adverse weather is expected from 11:30pm on Saturday and overnight into Sunday. River levels are expected to respond quickly to the forecast rainfall. Flooding of low-lying land and roads is expected."

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It comes just days after heavy rain left parts of south Wales under water earlier this week. On Tuesday there were incidents of flooding in areas including Cardiff Bay, other parts of the city and Newport, with even more flood alerts issued on Wednesday. Read more about that here.

Natural Resources Wales (NRW) issued 12 flood alerts on Saturday evening, ready for Sunday morning. In these areas, river levels are expected to be impacted from Saturday into Sunday. River levels are expected to be above normal and flooding of low-lying land and roads is expected. It could mean parts of Cardiff, Swansea, Carmarthen, the valleys and other areas are impacted by flooding.

NRW issues flood alerts where flooding is possible. It can also issue flood warnings which are more serious and require more urgent action, as well as severe flood warnings where there may be a danger to life. The alerts have been issued in the following areas:

  • Rivers Bran and Gwydderig at Llandovery

  • Rivers Taf and Cynin

  • River Ely

  • Rivers Nant-Y-Fendrod and Nant Bran

  • Upper Tawe

  • River Ewenny and Vale of Glamorgan west

  • Rivers Loughor and Amman

  • Rivers Gwendraeths

  • Lower Tawe

  • Rivers Llynfi and Ogmore

  • Rivers Afan and Kenfig

  • River Neath

The alerts around the Cardiff area
The other areas affected by the flood alerts including Swansea and Carmarthen

The weather warning issued by the Met Office on Saturday evening said: "Heavy rain likely to lead to some surface water flooding and transport disruption overnight and early Sunday morning." Read more about the warning here.