A flood warning has been issued to thousands of revellers heading to a popular beer festival near Sheffield.
There are reports that the downpour has caused a manhole cover to lift in Ravencar Road, Eckington.
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With more rain forecast, police have issued a warning to people attending the 3 Valleys Festival in and around Dronfield today.
Eckington Safer Neighbourhood Team tweeted: "Great Start to the 3 Valleys Festival. Localised flooding may cause disruption.
"Please take extra care on your way."
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The Met Office has issued a yellow 'be aware' warning for rain, which is valid until 8pm today with thunderstorms and large hail also possible.
It said: "Another day with the possibility that thundery weather could cause impacts due to flooding, lightning or possible large hail.
"Many parts will be wet and cloudy but only a few seem likely to see the heaviest downpours."
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Showers are expected to ease from around 8pm, giving way to a humid night, with temperatures expected to remain at around 16°C.