The Environment Agency has warned people in Boston to prepare for possible floods this evening.
The body says that the flooding could affect the area to the south of the South Forty Foot Drain and the River Witham, with the first forecast high water set to be at 7.30pm tonight.
The area affected could also include north and east of the Witham, including Fishtoft, wider waterside properties between Grand Sluice and the Docks in Boston, including Irby Street, Witham Place, Wormgate, High Street, South Terrace and London Road as well as waterside properties between Town Bridge and Haven Bridge.
The agency said: “We are expecting a tidal surge late on Thursday December 5, through Friday and into Saturday morning.
“This will lead to unusually high tide levels along the Wash and Tidal Estuaries. We expect this to result in significant seepage and some overtopping of the Haven defences which could result in property flooding near the defences and in wider low lying areas.
“Coastal paths and promenades could be highly dangerous as there is an increased risk of being swept out to sea. People are warned to stay away from the Haven and shoreline.
“The Environment Agency is monitoring the situation closely, working alongside partners including the Met Office and local authorities.
“Environment Agency officers are on the ground confirming the flood defences are in good working order, monitoring sea levels and wind directions.”