The Met Office has issued an amber weather warning ahead of heavy downpours forecast in parts of the UK this weekend.
Heavy rain is likely to cause a 'danger to life' on Sunday in Scotland, according to the weather warning issued.
The wet weather is also likely to spark travel chaos while homes and businesses could become flooded, causing damage to some buildings.
It comes as parts of the UK are still on flood watch, with 22 warnings and 90 alerts in place today.
The Met Office has put an amber warning in place across the north-west Highlands and Argyll on Sunday, while less severe yellow warnings have been issued from Saturday evening until Monday morning.
The River Thames begins to lap the towpath at Marlow in Buckinghamshire yesterday afternoon
Water rushes through the weir gates by Marlow Lock after the recent prolonged rainfall have made the levels rise
Many parts of the UK are still on flood watch, with 22 warnings and 90 alerts in place today
The rain is expected to worsen throughout the Saturday night and Scots travelling in the affected area have been asked to plan ahead before heading off.
How likely is snow at Christmas in Britain?
Forecasters say that in general, the UK is far more likely to see snow between January and March than in December.
Records show snow or sleet falls an average of 3.9 days in December, compared to 5.3 days in January, 5.6 days in February and 4.2 days in March.
White Christmases were also much more regular in the 18th and 19th centuries, especially before the change of calendar in 1752 which effectively pushed back Christmas Day by 12 days.
The Met Office defines a white Christmas when one snowflake is observed falling in the 24 hours of December 25 somewhere in the UK.
The national weather service states that it can 'accurately forecast if snow is likely on any given Christmas Day up to five days beforehand'.
Since 1960, around half of the years have seen at least 5 per cent of the network record snow falling on Christmas Day.
But there has only been a widespread covering on the ground - where more than 40 per cent of UK stations reported this at 9am - four times since that year.
These occasions were in 1981, 1995, 2009 and 2010.
Last year was technically a white Christmas given that 9 per cent of stations recorded snow falling on December 25, although none had snow lying on the ground.
Before that 2021 and 2020 were also white Christmases, with 6 per cent of weather stations recording snow falling in both years.
But in 2021 less than 1 per cent of stations had snow lying on the ground, while the figure was just 4 per cent in 2020.
There was no record of snow falling at any UK station in 2018 or 2019.
Christmas 2010 was very unusual, given that there snow on the ground at 83 per cent of stations, which was the highest amount ever recorded.
In addition, snow or sleet also fell at 19 per cent of stations.
One year earlier in 2009, there was also a white Christmas when 13 per cent of stations recorded snow or sleet falling, and 57 per cent had snow lying on the ground.
The agency predicts 100-150mm of rainfall in the area this weekend, potentially rising to 200mm in some west-facing upslopes.
The alert warns of the potential for power cuts and difficult driving conditions, and say 'fast flowing or deep floodwater is likely, causing danger to life'.
Scottish transport minister Fiona Hyslop has warned of potential disruption on the roads and to public transport caused by the weather.
She said: 'The Met Office is warning us to expect another period of heavy rain this weekend, which will likely bring disruption to the transport network in parts of north-west Scotland.
'Our trunk road teams will be out on the network to tackle any issues, but it's important motorists also play their part and plan their journeys before setting off.
'Make sure your route is available, follow the travel advice from Police Scotland, and drive in accordance with the conditions.
'The Traffic Scotland Twitter/X page is regularly updated with the latest information on the trunk road network and the mobile website my.trafficscotland.org gives you access to the latest information on the move.
'If you are planning to travel by train, ferry or plane, please check with your operators as the forecast conditions also have potential to impact your services.'
Ferry operator CalMac announced on X there are cancellations over the weekend, with potential disruption to other services.
One cancelled service is its Tarbert - Lochmaddy ferry.
Chief Superintendent Hilary Sloan, the head of road policing in Scotland, warned drivers of the impact heavy rain can have on stopping distances, urging people to 'consider if your journey is really necessary during the bad weather or if it can be delayed until conditions improve'.
David Scott, the flood duty manager at the Scottish Environmental Protection Agency (Sepa), said the rainfall 'is likely to bring significant surface water flooding impacts', and he urged people not to drive into flood water.
'Remember that not only is flood water likely to be dirty, 30cm of fast flowing water can move an average family sized car, and just 15cm of fast flowing water could be enough to knock you off your feet,' he said.
The Scottish Environment Protection Agency has one flood warning and five alerts in place.
Met Office spokesman Grahame Madge said: 'Strong southwesterly winds will feed in a prolonged and heavy spell of rain.
'In some areas up to 200mm of rainfall could be recorded, but 100-150mm is more likely across the wider warning area.
'In addition to the usual risks associated with high rainfall, there is the potential for landslides across the south of the Highland region and Argyll.'
SATURDAY: The Met Office has said a prolonged period of heavy rain this weekend is expected to lead to some flooding and travel disruption
SUNDAY: Tomorrow, however, there is a rare 'danger to life' amber warning in place across north-west Scotland
MONDAY: A yellow weather warning is in place until Monday, with travel chaos expected, while communities may be cut off by flooded roads
It comes as Brits prepare for some challenging weather during the festive period, despite forecasters predicting that the temperature could warm up in the days ahead.
By the end of next week, however, temperatures could drop again with an icy plunge predicted on December 20 and 21.
Despite a cold snap, hopes of a White Christmas are diminishing after the Met Office said there was 'little sign of any widespread or severe cold and wintry weather' around December 25.
But meteorologists also said there could be 'small amounts of hill snow in the North' next week - and 'snow and ice' was still possible between Christmas and New Year.
There is also an increased chance of colder spells into January, with the possibility of a 'more prolonged spell of cold weather developing around mid-month'.
The Met Office's long-range forecast for next Tuesday until December 28 states: 'Initially mild, wet and windy in southern areas before clearing away leaving conditions unsettled with showers of rain across western coasts and some hill snow affecting north-western areas, clearer to the east.
Canoeists paddle along a submerged road and flooded fields near Langport in Somerset yesterday
The embankment at Peterborough in Cambridgeshire is submerged in floodwater yesterday
Flooded fields in the market town of St Ives in Cambridgeshire are pictured yesterday morning
A property is surrounded by flooded land near Langport in Somerset yesterday
Canoeists paddle along a submerged road and flooded fields near Langport in Somerset yesterday
'Late in the week potential for a mild spell in the south as rain moves in with some small amounts of hill snow in the north before a period of more north or north-westerly winds with showers across coasts and turning wintry over hills.
'But clearer in the south, this likely recurring through the period with milder and wetter westerly periods interspersed with a risk of with colder north-westerly or northerly conditions and showers, some wintry over hills, for a time. However, at this stage there is little sign of any widespread or severe cold and wintry weather.'
Looking further ahead to the period of December 29 until January 12, the Met Office states: 'Most likely continuing unsettled with bands of rain crossing the UK with brighter conditions and showers in between.
'The wettest and windiest conditions are most likely in the north and northwest. Short-lived colder spells remain possible, with hazards such as snow and ice, particularly in the north.
'The chance of these colder spells increases moving into January, with a low likelihood of a more prolonged spell of cold weather developing around mid-month.'