Forecasters are warning the UK to brace itself, as sub-zero temperatures are set to usher in frost and inches-thick snow in some parts.
A cold front is set to cross the UK during Wednesday, causing the mercury to plummet from around 10C to 4C to 5C. The temperature will then drop below zero overnight into Thursday, and down to minus 5C in high ground in northern areas.
Health officials stressed that people should take extra care, as the Met Office issued a yellow “be aware” warning from the North West to East Anglia and urged the public to be aware of possible travel disruptions.
Wintry showers are expected to hit northern and eastern England and the Midlands, as well as parts of Wales, Scotland and Northern Ireland over the next couple of days.
The cold will be exacerbated by very strong winds, with snow showers likely in most areas, and the biggest build-up in hilly areas of the north west, according to the Met Office.
UK winter weather
UK winter weather
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Cars make their way through the snow in the Loxley area of Sheffield
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A cyclist makes his way through a blizzard in Durham
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Heavy snow falls on the A690 into Durham
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Picture of snow taken through a window of a plane stuck at Manchester Airport
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A woman walks in heavy snow in the Loxley area of Sheffield
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Heavy snow in the Loxley area of Sheffield
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A snow covered Durham Cathedral
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Snow covered graves at St Joseph's Church in west Belfast, as an orange weather alert is announced in Northern Ireland
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Sheep in snow, in the Glens of Antrim, as an orange weather alert is announced in Northern Ireland
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Snow Blizzards on the A9 road near Blackford, Perthshire as snow blizzards sweep across the country
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A cyclist on Dumbarton Road in Stirling during a snow blizzard
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A dog walker walks through the Kings Knot area below Stirling Castle during a snow blizzard
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Vehicles driving down Dumbarton Road in Stirling during a snow blizzard
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Scotrail train travels through snow covered country side near Lenzie, Scotland
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A man digs his car out of the snow near Shaw, northern England
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A dog walker in the snow on the Pennine hilltops near Reeth in the Yorkshire Dales, as many parts of the UK were on snow alert with wintry showers threatening to disrupt travel
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A snow plough on the A93 near Guildtown, as snow brings fresh disruption to parts of the UK
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Andrew Millington (left) and Stephen Peacock walk near the Spittal of Glenshee as snow brings fresh disruption to parts of the UK
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Snow covers the A68 near Corbridge in Northumberland, as many parts of the UK were on snow alert with wintry showers threatening to disrupt travel
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A car makes its way through snowfall in Gortin near Omagh, as many parts of the UK were on snow alert with wintry showers threatening to disrupt travel
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Sleaford Lincolnshire in the snow Boxing Day 2014
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Snow at Liverpool's John Lennon Airport, which closed temporarily on Friday night
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Maisy Byrne, aged nine, (left) and sister Lulu Byrne, aged seven, have fun as snow falls on Boxing Day in Gateacre, Liverpool
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A decorative snowman surrounded by real snow outside a house in Eccleston Park, near Prescot, Merseyside
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Maisy Byrne, 9, left, and sister Lulu Byrne, 7, have fun as snow falls in Gateacre, Liverpool
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Snowfall in Uttoxeter, Staffordshire on Boxing Day
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A man pushing a motorcycle through snow in Newtown Linford, Leicestershire on Boxing Day
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On the M6 near Sandbach
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Snow swirling around the grounds of Lichfield Cathedral on Boxing Day
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Referee Mark Clattenburg during the Premier League football match between Manchester City and West Bromwich Albion at The Hawthorns in the Midlands
Forecasters expect over 10cm of snow to fall in high ground in Scotland and Northern Ireland, and 5 to 10cm at lower levels, while 3 to 6cm of snow will accumulate on high ground in the north of England.
While the cold weather is set to remain into early next week Billy Payne of forecaster MeteoGroup said it is unlikely the UK could see any impact of the heavy blizzards hitting much of the north-eastern coast of the US.
Meanwhile, Dr Angie Bone, head of extreme events team at Public Health England, urged people to help their vulnerable neighbours and loved ones.
"In this sort of weather we know that older people and people in poor health tend to stay indoors.
"While this is sensible, it's worth remembering these people may need help getting to a hospital or GP appointment, with shopping or prescription fetching, or just someone to talk to. If you know someone in this situation, and most of us do, think about what you can you do to help out.
She added that vulnerable people are not the only ones at risk. "Contrary to popular belief, it's actually working age adults who have most slips and trips outside in cold and icy weather, not older people, which is why it's important to wear shoes with a good, slip-resistant grip to prevent any accidental falls."
Additional reporting by PAReuse content