More than half a month’s worth of rain could fall in parts of the UK in the next 24 hours, the Met Office has said.
Yellow weather warnings for thunderstorms and rain are in place across England and Wales – and southern parts of Scotland – and only expire at midnight tonight.
A further alert covering the west of Northern Ireland is in force until 9pm this evening.
And an additional warning for heavy rain is in force from 12am to 12pm on Monday – bringing a risk of disruption in northern England and large swathes of Scotland.
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Some places could see as much as 80mm of rain fall over the next 24 hours, which is more than 15 days’ worth.
In comparison, only 77mm of rain – equal to 12 days – has fallen in June so far over the entirety of the UK.
Overnight, areas of England were pelted with rain. Highs of 21.5mm fell in Ringley near Manchester, while Charlwood in Surrey reported 18.6mm.
Jonathan Vautrey, a Met Office forecaster, said: “Some places could see 40mm to 60mm of rain, even 80mm in some places, which could cause some difficult travelling conditions over the next 24 hours.”
Motorists have been warned spray and sudden flooding could lead to difficult driving conditions and possible road closures.
Delays are also expected on rail and bus services in the event of flooding or lightning.
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With 14 flood warnings in place across the UK this afternoon, national flood duty manager Sarah Cook warned motorists not to drive through flooding – as 30cm of flowing water is enough to “float your car”.
The Met Office has also said power cuts might occur and other services to some homes and businesses could be lost.
Despite the wet weather and more cloud, temperatures will reach the low 20s, making the air feel humid. Grass and nettle pollen will also be very strong.
No further weather warnings have been issued for the coming week so far.