Eight flood warnings are in place in Scotland and Wales, following torrential rain which caused chaos in northern and western Britain.
The rain flooded hundreds of homes, closed roads and saw part of the West Coast Main rail line shut for a time.
In Birmingham, heavy rain was followed by reports of a tornado loosening roof tiles and sending debris into the air.
Forecasters have said overall rain is subsiding but warn of further downpours in the Midlands and North East England.
On Wednesday evening, there were six flood warnings and 21 flood watches in place in Scotland.
One flood warning was in place in the English Midlands and 19 flood watches across England and Wales.
However, BBC weather said heavy rain across most of the country was expected to die out overnight.
The Environment Agency is advising people to check their insurance
Many of those towns affected were beginning to clean-up as the waters retreated.
In Tuesday night's downpour, a month's worth of rain fell in 24 hours in Milford Haven, Wales, and Eskdalemuir, in the Scottish Borders.
Cardiff Met Office said Milford Haven had a total of 113.8mm of rain in 24 hours, compared to the monthly average of 110mm.
Areas of Hawick, in the Scottish Borders, were under four feet of water, after the River Teviot burst its banks.
Virgin Trains earlier said extensive flooding had closed the west coast main line north of Carlisle and advised passengers to use GNER services on the east coast line.
However, by Wednesday evening, the majority of Virgin trains were passing through Carlisle, with a normal service expected on Thursday.
The flooding came as the Environment Agency warned that two-fifths of householders were unaware they lived in flood risk areas.
The Environment Agency said it demonstrated people living in the UK could "not afford to be complacent about flooding".
"There's a tendency for people to think 'it'll never happen to me'," chief executive Baroness Young said.
The agency is advising people to find out if they live in a flood risk area and make sure they are covered by their insurance.
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