THE Met Office have warned of heavy rain with flooding and power cuts expected as a yellow weather warning was put in place.
Brits are braced for more wet and windy conditions after a cloudy beginning to the Bank Holiday weekend ended with sunny spells.
The yellow weather warning is in place for much of south-west Scotland.
It came into force at 3am today and will last until 7pm.
Areas such as Dumfries and Galloway, South Lanarkshire, and the Scottish Borders will be the worst affected.
Forecasters said it would be wet across western Scotland and Cumbria although this could ease as the rain moves southwards and eastwards.
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Heavy rain has already hit Scotland, with officials warning delays and timetable revisions to trains are expected to last until 2pm.
‘Severe weather’ has disrupted commuter’s journeys from Glasgow Queen Street and is set to last for most of the day.
National Rail confirmed a speed restriction on the tracks is in place between the major station in Scotland and Mallaig/Oban.
The risk of flooding and persistent rain will last until the evening.
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But its not all bad news for Brits with some parts of the country expected to see sunny conditions amid pleasant temperatures.
Further south will be a different story with dry weather and bright spells before getting hotter tomorrow.
England and parts of Wales will remain dry today with brighter conditions with temperatures rising in the south and east, said the Met Office.
Tonight's weather will see cloudy conditions in the north and west with the rain easing.
Forecasters said it would be drier in the southeast and will be a "mild night for all".
The Met Office said the humid conditions could feel "rather muggy" in the southeast.
Met Office Chief Meteorologist Dan Suri said: “A frontal system arriving to the west and northwest of the UK will become slow moving on Tuesday, with 25-40mm of rain likely quite widely within the warning area, while in excess of 60mm could fall on exposed hills.
"With this falling on saturated ground in the area, there’s an increased sensitivity to rainfall amounts of this kind which could lead to disruption for some.
“Parts of western Scotland and Cumbria will also see a spell of wet weather from this frontal system before it weakens later. Much of the south and east of England, however, will have a fine, dry and bright day on Tuesday.”
Most areas will be mostly dry once again on Wednesday with temperatures peaking mid week in the southeast.
However, heavy rain and stronger winds will move slowly eastwards from Wednesday and through to the end of the working week.
London and areas like Essex and Kent will get the brightest weather, while those in Scotland may have to make do with heavy rain.
Met Office Five-day forecast
Today
Wet across western Scotland and Cumbria although this tending to ease as it moves southwards and eastwards.
Warm and sunny ahead of the rain band, with blustery showers following behind. Windy in the northwest with gales at times, easing later.
Tonight
Cloudy in the north and west with the rain easing. Drier in the southeast. A mild night for all and feeling rather muggy in the southeast.
Wednesday
Very warm with sunny spells in the southeast on Wednesday, otherwise changeable with a mix of rain and showers elsewhere. Staying rather cool in the northwest.
Thursday to Saturday
Drier and brighter through the period as higher pressure builds into the weekend.
Lighter winds than of late with temperatures near or just above average for the time of year.
Met Office Deputy Chief Meteorologist Nick Silkstone said: “There is a warmer interlude of weather on the way for those in the south and east of the UK from the middle of the week.
“Temperatures on Wednesday could peak at 29C in the southeast, with some good spells of sunshine for much of England and Wales.
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“While this initial warmth will be relatively short-lived, with a return towards average temperatures by Thursday, the weather will continue with a drier and more settled theme during the second half of the week under the influence of high pressure.
“The main exception to this will likely be the ongoing chance of some cloud and rain arriving across the northwest later in the week, though even here there should be some drier and brighter interludes.”
Long range weather forecast
Saturday August 31 - Monday September 9
High pressure will tend to be located either over or close to the UK through much of this period, leading to a more widely settled period of weather.
That said, weak frontal systems could still provide some cloud and patchy outbreaks of rain at times, this most likely in northwestern areas, although any amounts of rain away from the far northwest will be typically small.
The best of the drier and brighter conditions, at least initially, will be in more southern and eastern parts.
A trend towards very warm or fairly hot conditions, especially in southern areas around the turn of the month, with a chance of a few showers or thunderstorms as a result.
Towards the second week of September a trend to more average temperatures is probable.