The Environment Agency said those living along the lower reaches of the Thames in Surrey should remain prepared for further flooding this weekend as water levels continue to rise.
It said in a statement: "There is also an ongoing risk of flooding from the Rivers Parret in Somerset and the Severn in the Midlands. High groundwater levels mean we are likely to see continued flooding in areas such as the Somerset levels and moors, Dorset and Wiltshire."
But it said that water levels on the Thames between Lechlade, Gloucestershire, and Reading in Berkshire were beginning to slowly recede - while between Reading and Maidenhead they were stabilising.
The most recent estimates suggest that more than 700 properties have been flooded since the start of the year, but more than 239,000 properties have been protected by flood defences.