A flood alert was issued at 12pm today for Patcham, Brighton, by the Environment Agency.
People are being warned that groundwater levels in the area are close to the surface and rising.
They are being urged to ensure any pumps in residents’ homes are operational with flooding possible from Saturday.
A spokesman for the Environment Agency said: “While it is probable that groundwater will remain below the surface, like in December 2023, if the maximum predicted rain falls, then from Saturday minor groundwater flood impacts could be possible.
“Water could begin to appear in a small number of basements. Previous events suggest impacts may initially affect Old London Road, Patcham and Peacock Lane, Withdean.”
Flooding could also impact Mill Road near the petrol station, Audrey Close, Park Court, the bottom part of Church Hill and Greatham Court.
Sewers in Patcham have struggled with groundwater flooding in the past, as reported in The Argus last November.
Groundwater levels could rise until Wednesday, January 10, at Ladies Mile borehole.
A yellow weather warning for Sussex and the rest of the south of England was issued by the Met Office from 12pm today until 3am tomorrow.
Patcham resident David Harris monitors groundwater levels in the village.
At 6am this morning, groundwater levels were 39.85m above sea level. The level for cellar flooding in the village is 43.8m and for surface flooding is 47m.
His current forecast said there could be cellar flooding this Saturday and potentially surface flooding on Sunday.
Alistair McNair, Conservative councillor for Patcham and Hollingbury, said: “The water is rising at the moment, it is expected to enter cellars in the Old London Road area if it continues to rain.
Flooding in August around the Deneway roundabout in Patcham (Image: Patcham Against Royal Mail)
“Residents should be testing their pumps. There is no surface flooding at the moment but it is likely in the next 24 hours if it continues to rain as expected.”
It comes after disruption caused across the county by Storm Henk this week.
After 30mm of rainfall on Monday and Tuesday, a further 15 to 30mm of rain is forecast in parts of the county on Thursday, meaning areas which have already been hit by flooding could be at risk once again.
There are 16 other flood alerts around the county and six flood warnings.
Brighton and Hove City Council has been approached for comment.
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