FLASH floods and thunderstorms are sweeping parts of the UK as a month's worth of rain is set to fall in just two hours.
The Met Office has issued a thunderstorm warning for much of Scotland and northern England which is in place until 9pm on Thursday.
Heavy showers may cause flooding and travel disruption, with forecasters warning there is a small chance of fast-flowing or deep flood waters causing danger to life.
Meteorologist Emma Smith said 30mm of rain could fall in one hour, while 50mm could fall in two to three hours.
'DANGER TO LIFE'
The average amount of rainfall in July for the UK as a whole is 70mm, while the July average for England is 55-56mm – meaning that almost a month's worth of rainfall could fall in a couple of hours on Thursday.
The yellow thunderstorm alert from the Met Office warns there is a small chance that homes and businesses could be flooded quickly, with damage to some buildings from floodwater and lightning strikes.
In places where there is flooding or lightning strikes, there is a chance of delays and cancellations to train and bus services.
Forecasters have also warned of difficult driving conditions, some road closures and power cuts.
The Met Office warned: "Heavy showers and thunderstorms are likely to develop during Thursday afternoon across parts of Scotland and northern England.
"Whilst many areas will miss the heaviest rain, where heavy showers and thunderstorms do develop they will be slow-moving bringing the potential for 20-30 mm of rain in an hour and 40-50 mm in 2-3 hours.
"Showers and thunderstorms will gradually die out during Thursday evening."
The yellow weather warning went into effect at midday today – prompting a dire "danger to life" warning.
The Met Office issued the chilling forecast for heavy rain amid fears of homes being flooded and travel chaos for millions.
Those worst affected will be in parts of Scotland, East Midlands, North East England, North West England and Yorkshire.
The warning reads: "Heavy showers and thunderstorms may cause some travel disruption and flooding in places during Thursday afternoon and evening.
"There is a small chance of fast flowing or deep floodwater causing danger to life."
Weather conditions could get even worse by Friday – as the heavy and thundery showers get into full swing.
But it’s not all bad news as a "hot air plume" is predicted to arrive on Saturday – potentially bringing with it highs of 28C.
The Weather Channel has forecast an explosion of heatwaves before the end of the summer.
SUNSHINE AND SHOWERS
Elsewhere, rain and thick cloud will make tomorrow a dreary day for millions – especially in northern, central and western parts.
Further south will see brighter conditions throughout the day.
The Met Office said: "Rather cloudy at first with some rain across central and northern parts.
"Brightening up away from northern and western coasts with sunny spells and showers developing, these most frequent in the east.
"Thundery downpours over eastern Scotland and northeast England."
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