The harbour master of Wells-next-the-Sea has posted images on twitter of the state of the sea an hour before high tide.
The pictures show the sea level has overtopped the harbour wall.
Residents of Jaywick, Mistley and West Mersea are being urged to head to rest centres as a severe flood warning remains in place ahead of a high tide tonight.
Around 140 people had registered at the rest centre in Jaywick by 6pm this evening.
Essex Police Chief Inspector Russ Cole said:
"I am extremely grateful to residents for acting on our instruction and evacuating and all partners in Jaywick, Mistley and West Mersea for their work to support their communities.
We have seen numbers of people using the rest centres in Jaywick increase steadily during the late afternoon. I know from talking to many people that friends and family are also housing many more people.
I still need anyone who has not yet evacuated their property to do so immediately. The flood warning for high tide after midnight remains at severe and there is a threat to life as a result."
Approximately 15 properties are being evacuated in Salthouse in response to severe flood warnings issued for high waters tonight, Norfolk Police have said.
Properties affected by the warning will be visited by Community Flood Wardens, supported by officers from North Norfolk District Council.
Where possible, residents are being advised to make alternative arrangements to stay with family or friends who do not live in affected areas.
Villagers in Jaywick are being told to leave their homes by police going door to door - but not everyone has been convinced.
These householders told us they did not plan to evacuate their properties.
One told ITV News Anglia he believed the warnings were "scare tactics" and would "believe it when it happens".
"I don't think we will be going anywhere."
Lowestoft station will be closed tonight at the request of the police as they prepare for potential flooding.
No one will be able to travel to or from the station after around 8pm.
The final service will leave Lowestoft at 8.07pm, heading to Ipswich. The 5pm train from London, 6.13pm from Ipswich and 7.02pm from Norwich will be the last to arrive at the station before it closes.
Police fear tonight's tidal surge will cause flooding which could damage the station, track and signalling equipment.
Dozens of people in the north Norfolk village of Walcott have become the latest to be evacuated from their homes.
A severe flood warning is in place for tonight's high tide and police are being joined by firefighters and the military to encourage people to leave their properties.
About 80 residents are behind advised to evacuate by officers who are going door to door.
A rest centre has been set up at The Lighthouse Pub for anyone unable to find alternative accommodation.
"We understand people will be anxious but this action is necessary on the back of the latest information from the Environment Agency, which suggests the threat is significant. We also have additional police resources in place to manage the response.”
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Blythburgh, Kirkley and The Strood have been added to the list of areas where the Environment Agency fears flooding could pose a "danger to life".
There are now 17 severe flood warnings in place covering large parts of Norfolk, Suffolk and Essex.
Experts fear the biggest risk will come with this evening's high tide with properties in all three counties being evacuated while it is still daylight.
The full list of severe flood warnings is now:
- Aldeburgh and Thorpeness
- Blythburgh and marshes upstream of A12
- Great Yarmouth from South Denes to South Quay
- North Quay, Newtown and Bure Park in Great Yarmouth
- Lowestoft seafront and docks
- North bank of Lake Lothing
- Oulton Broad near Mutford Lock
- Riverside Business Park and Kirkley
- Rivers Yare and Bure from Runham Vauxhall to Scare Gap
- Snape, Iken and surround marshland
- South bank of Lake Lothing, Bourne Business Park to Mutford Lock
- Southwold and surrounding marshes
- The coast from Clacton to Lee Wick
- Tidal River Stour at Mistley, including the Quay and The Walls
- West bank of the River Yare from Gorleston to Ferry Hill
- West bank of the Yare at Yarmouth including Southtown and Cobholm
- West Mersea, The Strood and adjacent marshland
Norwich Airport re-opened at 1pm this lunchtime.
It was closed earlier in the day after snow reached "unsafe levels".