Brits are being hit by storms bringing torrential rain, hailstone and flash flooding as it sweeps up the country with the main band currently over the north of England and southern Scotland.
Images show cars driving through floods, while people have had to be rescued from their homes and a house was hit by lightning in Essex.
There are currently two flood warnings and 34 alerts in place from the Environment Agency which are mainly in Yorkshire and Lancashire where the worst of the storms are currently striking.
Most of the country is blanketed with Met Office warnings for either rain or thunderstorms, with more than half a month’s rainfall possibly landing.
Live radar images showed the main storm started to move in from the Channel in early afternoon, and move its way over the southeast of the country.
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There have been pockets of storm clouds dotted around England and Wales mixed in with the sunshine and temperatures remain warm in the low to mid 20Cs.
But now radar images show a large band of stormy weather over the north of England and southern Scotland.
- You can check out the thunderstorms in your area on Radar Live here.
Alton Towers rides were suddenly brought to an abrupt halt with thrillseekers forced to leave carriages as the theme park was hit by a thunderstorm.
And an elderly woman was rescued from her home after a huge thunderstorm caused her road in Radcliffe, Bury, to flood, with the street blocked off and fire crews at the scene.
There have been reports of hundreds of homes suffering power cuts while a dramatic image shows a house on fire in Corringham, Essex, after being struck by lightning.
It comes after showers hit areas of England overnight - with 21.5mm in Ringley, near Manchester, and 18.6mm falling in Charlwood, Surrey.
Jonathan Vautrey, a Met Office forecaster, said: "Some places could see 40mm to 60mm of rain, even 80mm in some places, which is more than half a month's worth of rainfall depending on where you are.
"That could cause some sudden flooding spray on roads which could cause some difficult travelling conditions over the next 24 hours."
In June, the entire UK averages 12 days of rain, totalling 77mm.
A yellow thunderstorm warning almost entirely covers England and Wales between noon and midnight, and there is also one until 9pm in Northern Ireland.
It warns of heavy showers, the potential for frequent lightning, strong winds and hail - which could cause flooding, travel issues and power cuts.
In northern England and Scotland, a yellow heavy rain warning is in place from 7pm on Sunday until noon on Monday.
Mr Vautrey said: "Overnight some places had showers and heavy bursts of rain, particularly in north-west England and the south-east.
"There were a couple of thunderstorms and rainy patches that grazed western Scotland, with heavy rain in Northern Ireland.
"If you were in those pockets, you would have seen heavy outbursts."
He added: "With the heavy rain expected over the next 24 hours or so that could exacerbate some issues with flooding - but it has been very dry of late."
The seven flood warnings from the Environment Agency are for Bagley Dike at Grimesthorpe, Batley Beck at Bradford Road through central Batley, Batley Beck at Carlinghow and Crossbank, Batley Beck at central Batley and surrounding areas, Car Brook at Darnall, Hunsworth Beck at Oakenshaw and Pimlico Brook at Clitheroe, along Warwick Drive and Dorset Drive.
There are generally moderate or high UV levels across the UK, despite there being more cloud, while grass and nettle pollen is also very strong, the Met Office said.
Temperatures will reach the low twenties - making the air feel humid - despite the UK being in an area of low pressure.
