Photo: Sunset over flooded Gloucestershire pic: Andy Coates
The Environment Agency has issued flood warnings for several stretches of the Thames from Oxford, through Windsor to Shepperton and Teddington.
Worst flooding for decades
Monsoon-like rainstorms have overwhelmed swathes of Oxfordshire, Worcestershire, Warwickshire and Gloucestershire - and insurers have said the final repair bill could top £2bn.
The floods have been described as the worst in modern history.
An Environment Agency spokesman said: "We have not seen flooding of this magnitude before. The benchmark was 1947 and this has already exceeded it."