Environment Agency Wales is advising people to be vigilant for potential localised flooding across many parts of Wales as heavy rainfall is forecast on Wednesday and into Thursday.
Whilst the heavy rain will be concentrated initially in South East Wales, rain is expected to spread to most parts of the country.
The Agency is warning that land remains saturated from recent heavy rainfall, and any further rain could quickly find its way into rivers and streams.
Flood alerts and warnings could be being issued for some rivers in the South East.
There is also a risk of localised flooding of roads and low lying land from blocked drains, ditches and small streams.
Agency officers are currently working in the area to check that rivers are clear of blockages and that Agency defences are in good working order.
People are advised to take extra care while travelling as driving conditions could be hazardous.
Flood water is extremely dangerous and people should not attempt to walk or drive through flood water.
The Agency is advising people to keep up to date with the latest information in their area by listening to local weather and traffic reports, and viewing the latest information on the Met Office website.