The Environment Agency has issued 25 flood warnings and 29 flood alerts in the Midlands.
More information can be found on the Environment Agency website.
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It's believed there were around 8,000 people who laced up for this year's 10k race.
Sporadic outbreaks of rain will spread to all areas overnight, with some heavy bursts at first.
Cloudy with outbreaks of rain, mainly after midnight. Winds will start to ease.