Natural Resources Wales (NRW) is warning people of the risk of significant river and surface water flooding today and over the weekend as Storm Jorge hits Wales.
A yellow warning for heavy rain has been issued by the Met Office.
This may lead to major problems and dangerous conditions, especially in South Wales, where rivers are expected to rise quickly.
With river levels still very high and ground saturated following the recent storms, many Flood Warnings are expected today and overnight, including for the South Wales Valleys.
Whilst the worst of the rainfall is likely to be over South Wales people in other parts of Wales should be prepared for impacts and stay safe.
NRW staff will be working around the clock to help communities be prepared – monitoring river levels, issuing warnings, checking and erecting defences, and making sure drainage grids and screens are clear.
Jeremy Parr, Head of Flood Incident Risk Management for NRW, said: “Coming so soon after Storm Dennis, we are particularly concerned that the forecast is for significant levels of rain in South Wales.
"This could have impacts again in the eastern valleys of South Wales and everyone should take the warnings extremely seriously.
“We are working hard to make sure communities are as prepared as possible and urge people to take care and make arrangements to be safe.
“People are advised to take great care if you need to travel. If you are out, take extreme caution and never drive or walk through flood waters.
“Keep an eye on the forecast and visit our website for the latest information on flood warnings. You can find practical advice on flooding on our website too.”
Flood alerts and flood warnings are updated on the Natural Resources Wales website every 15 minutes.
Information and updates are also available by calling Floodline on 0345 988 1188.
People can also register for free flood warnings either by calling the Floodline number or on NRW’s website www.naturalresources.wales/flooding
Check river levels online here - https://naturalresources.wales/evidence-and-data/maps/check-river-levels/?lang=en
NRW is also working very closely with local authorities, the Police, community flood wardens and many others to help keep everyone safe.