The Welney Wash road on the Cambridgeshire/Norfolk border is expected to close within the next 24 hours – if not sooner – because of flooding.
Environment Agency (EA) officials are monitoring the situation closely and their website is being updated regularly with latest information.
An EA spokesperson said: "Due to the recent heavy rainfall we have seen high river levels across East Anglia.
"With more rain forecast for the coming days it's likely that more flood water will be going in to the Ouse Washes Flood Storage Reservoir and on to the A1101 Wash Road/Welney Causeway.
"This could lead to the road being closed by Norfolk County Council.
"People who may be affected are advised to check the nearby electronic signage which will update drivers of the current water levels on the road.
"Drivers are urged to stay safe and not drive through flood water. Just 30cm of flood water can move a car."
You can keep up to date with Flood Alerts and Warnings for your area via the website flood-warning-information.service.gov.uk
Councillor Ken Goodger, a Welney parish councillor, is also the village liaison officer in relation to the Wash road flooding.
He said that he had received a call to say they expect flooding at Sutton Gault to occur imminently with the knock on effects for Welney to follow.
Cllr Goodger - who is one of the local farmers that over the years have rescued stranded motorists from the Wash road - says people should be cautious about over reliance on the flashing warning signs.
"I have tried to get the display readings to be more in line with the actual deepest point but the authorities are reluctant to change them," he said.
"Please also be aware that once signs go up you cross the flooded road at your own risk and most insurance companies will not support you.
"The police can prosecute if you put yourself and others at risk. Some officers will give a ticket to those that disobey the road closure signs.
"Quite simply you cross the flooded road at your own risk once signage is up."
To check levels the EA have live levels of the flood water for the road on the site, https://flood-warning-information.service.gov.uk/stati…/6245
The Ouse Washes provide storage for floodwater that the River Great Ouse cannot discharge directly into the sea at King's Lynn without overflowing its banks.
An article on the Welney website points out that the excess waters are held within the washes until tides and river flows allow discharge back into the river and thence the sea. This can take a few days or a several weeks.
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