Residents are being told to move their possessions to safety as flood warnings are issued for the Norfolk and Suffolk coast.The Environment Agency (EA) issued the warnings because a surge of water is due to hit north Norfolk at 19:50 GMT, before moving along the Suffolk coast.Valuables and insurance documents should be moved upstairs in affected homes, an EA spokeswoman said.Air holes in bricks should also be covered to stop rising water, she said.David Kemp, from the Environment Agency, said a storm passing over Scotland overnight had caused a surge of water in the North Sea.The surge is expected to hit north Norfolk at high tide and move down the coast over the following five hours.The agency has issued flood warnings for the Norfolk coast at Salthouse and Wells Quay, as well as Blythburgh in Suffolk and Lowestoft seafront and docks.The warning means flooding is expected and immediate action is needed.Flood alerts have also been issued for the Norfolk Coast from Old Hunstanton to Great Yarmouth and down the Suffolk coast towards Southwold.Residents can visit the Environment Agency website for updates and advice.