Aerial footage shows the extent of flooding along the Thames
More severe weather is expected to hit flood-stricken parts of the UK later, as the prime minister continues a tour of the worst-affected areas.
Fourteen severe flood warnings remain in place in Berkshire and Surrey, and two in Somerset.
There is a stronger amber warning - meaning "be prepared" - for wind for Wednesday with "possible gusts of 80mph or more in exposed areas" areas of the South West.
BBC weather forecaster Laura Gilchrist said deep areas of low pressure on Wednesday could bring, potentially, the strongest wind so far this winter.
The warning comes after Monday saw further homes flooded and properties along the River Thames evacuated with warnings that thousands were more at risk.
Alanna Burns, of Chertsey in Surrey, told BBC Radio 4's Today programme water levels were still rising, and there were not enough officials around and no sandbags.
Residents have been left like "sitting ducks waiting for it to happen", she said.
Why is it happening?
The UK's weather is dominated by the jet stream. This narrow band of fast-flowing air high in the atmosphere is driven by temperature differences between cold air to the north and warm air to the south. This winter that contrast has been particularly large, creating a strong jet stream driving across the Atlantic.
Variations in the jet stream - such as curvature or changes in speed - can drive the development of storms. The faster the jet stream, the greater force behind these variations - and that's meant a conveyor belt of storms coming to the UK.
Usually the jet stream would oscillate in large waves as it circles the globe at our latitude, allowing for varied weather patterns throughout a season and bringing us our typically changeable British weather. Occasionally the jet stream will stagnate into a particular pattern - in this case strong and straight - which leads to the weather maintaining a certain pattern - in this case stormy.
The UK is especially sensitive to Atlantic weather systems driven in by the jet stream, being an island positioned between the Atlantic Ocean and the large land mass of continental Europe. It is under the influence of five different air masses, each with its own character. This makes its weather distinctly variable.
But this hasn't just been an active time for weather in the UK. Much of Europe has been feeling the effects of Atlantic storms too. Recently there has been flooding in France, large snowfall in Germany and Slovenia and large waves have been affecting Portugal and Spain too.