The Environment Agency has issued more than 20 flood alerts for north England, the Midlands, the South East and Wales as heavy rain is set to lash the country.
The Met Office has also issued a number of severe weather warnings, for the Central, Tayside and Fife, London and the South East, south-west Scotland, Lothian Borders, the South West, Strathclyde and Wales.
It warned that heavy rain of up to 30mm (1.2in) will fall over high ground in Scotland during the morning, with thunderstorms and gusts of up to 60mph along the south coast of England.
More top news
There is a snow and ice warning in force for much of the UK tomorrow, but temperatures will be slightly higher than today.
A Quebec man has missed out on winning millions on the Canadian lottery, because his ticket was printed out seven seconds too late.
The dramatic moment that Dutch police stormed a TV studio to arrest a gunman was caught on the station's cameras.