A Flood Alert has been issued by the Environment Agency for the River Thame and Chalgrove Brook.
Flooding is possible for the River Thame from Marsworth to Dorchester including, Long Marston, Rowsham, North Ayelsbury, Cuddington, Thame, Shabbington, Ickford, Waterperry, Cuddesdon, Wheatley, Quarrendon, Drayton St Leonard, Overy, the Chalgrove Brook at Chalgrove and Stadhampton.
Low lying land and roads will be affected first.
The Environment Agency's advice is "be prepared"
More top news
Wednesday's forecast for the east of the region
Wednesday's forecast for the west of the region
Eurostar passengers were left stranded last night after migrants reportedly climbed on top of trains at Calais.