Fresh flooding is expected in towns and villages close to the River Thames in Surrey as levels continue to rise.
Levels are expected to rise as the rain that fell on saturated ground earlier this week drains into the river system.
Surrey Police said a number of vehicles had to be towed out of water on the A320 near Staines after motorists attempted to drive through.
Motorists have also attempted tried to drive over Chertsey Bridge, also closed due to flooding.
Supt Chris Moon said: "I would urge drivers not to attempt to drive through the water.
"There may be hazards you cannot see. Two feet of water is enough to float a car."
Some properties close to the river in East and West Molesey, Staines, Sunbury and Weybridge have already been affected by flood water.
Allegra Taylor, who lives on Sunbury Court Island, said the rising water level was causing real concern for residents.
She added: "It looks dreadful here and we're just praying that it doesn't get any higher because if it comes into the house we're really done for - everything precious to us is stacked up on the floors."
Dozens of homes were flooded in the town on Wednesday, forcing some residents to spend the night in a community centre in nearby Shepperton.
Properties at the Abbey Fields caravan park were also surrounded by water from the River Thames.
Elmbridge Borough Council has issued sandbags in areas its says are particularly vulnerable, posted flood advice on its website and urged motorists to take drive with care.
In a statement on its website, Spelthorne Borough Council said it would be "focusing on the most vulnerable people and providing critical support".
It also encouraged residents to "keep an eye out for neighbours - young or old" who may need help.
The Met Office said it would be dry and sunny for most of Friday but would cloud over during the evening with some outbreaks of rain crossing all parts of the county overnight.
Residents in Leatherhead have criticised the Environment Agency for not giving enough them notice ahead of flooding in the town in December.
A number of homes were flooded on Christmas Eve when the River Mole broke its banks.
Edward Tippelt, who lives in Cannon Grove, said: "We were given approximately three hours notice when the flood warning was issued by Environment Agency very, very late in the day.
"Had we had more warning we could have saved a few more items but at the end of the day, by about 11.30, 12 o'clock, the water started coming into the house and we had to just stand back and watch while the waters rose."
A spokeswoman for the Environment Agency said: We are working closely with our professional partners to support the communities that have been affected by flooding in Mole Valley and elsewhere over the Christmas period.
"Over the course of the recent incident, river flows around Leatherhead and Fetcham are likely to have been the highest the area has experienced since the flood of 1968."