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".
Many residents in the Essex village of Jaywick have begun evacuating their homes with severe flood warnings in place along the county's coast.
People living in Jaywick, Mistley and West Mersea have all been urged to leave their homes immediately by police.
Authorities say the high tide expected shortly before 1pm will pose a danger to life.
Many residents have decided to leave coastal Jaywick, unsure when to return because of a high-tide near to midnight.
Others are staying put, preferring to see out the bad weather from inside their homes.
More than 90 flood warnings are in place - 11 severe - along Britain's east coast as thousands of residents evacuate their homes.
The Environment Agency's midday update came as new high tide warnings were issued across the regions:
Police issue advice to people thought to be at risk from floods - including coach pick-ups for people who need help getting to rest centres.Read the full story ›
The Met Office has issued a yellow weather warning for ice in the East of England.
The alert covers Norfolk, Suffolk, Central Bedfordshire, Hertfordshire, Bedford, Luton, Cambridgeshire and Peterborough.
It is valid from 4pm this afternoon until midday Saturday.
"Ice is likely to form on untreated surfaces especially where showers of sleet, snow and hail occur."
People living in three Essex villages have been told to evacuate their homes immediate as the flood warning returns to the highest levels.Read the full story ›
Norwich Airport has been closed because snow has reached an "unsafe levels".
The decision was made at 10.45am and staff will assess the situation again in the next couple of hours.
It is not known when the airport will reopen and passengers are being urged to check the latest information before heading there.
@LeeSutton97 posted this picture on Twitter this morning.
The promised snow has well and truly arrived and is now affecting the Anglia region from west to east. Here's a selection of images.Read the full story ›
These pictures show communities in Gorleston, Norfolk, working hard to protect their homes from a tidal surge.
The first high tide, at about 9.40am, passed without any major disruption but it is feared this evening's could be worst than initially feared.
The next high tide is due at Gorleston at about 9.49pm.
Homeowners are hoping these sandbags will help keep them and their properties safe.