Forecasters have issued a rare red weather alert, warning that extreme snow and wind which could pose a risk to lives is heading to parts of Wales and south-west England.
The Met Office urged people in the affected area to take immediate action to keep themselves safe as Britain faces strong gales, blizzards and rare freezing rain.
The red snow warning, which begins at 3pm, is just the third issued in the past seven years and comes as Storm Emma blows in from the Atlantic.
1/2 National gas demand today is high and due to the extreme weather conditions, there have been gas supply losses overnight. At 5.45am this morning we issued a ‘Gas Deficit Warning’ to the market.
— National Grid Media (@Grid_Media) March 1, 2018
It means “widespread damage, travel and power disruption and risk to life is likely”, with concerns some rural communities could be cut off for days.
The fresh warning comes after Scotland’s red alert ended at 10am.
Meanwhile, the Irish Republic was put under red alert at 11pm on Wednesday as it was hit by the worst snow in 35 years, with the warning set to run until 3pm on Friday.
RED Snow-Ice Warning issued FOR ALL COUNTIESStatus: RedValid: Wed 11pm until Friday 3pmLatest information & warning updates here:https://t.co/X6NncUghZ9 pic.twitter.com/nUlpHYwxzO
— Met Éireann (@MetEireann) February 28, 2018
Snowfall will grow heavier through Thursday afternoon and evening with 10-20cm likely to settle widely across red alert areas, Met Office chief meteorologist Paul Gundersen said.
He added freezing rain may batter parts of south-west England and Wales on Thursday night, potentially creating large, hazardous icy stretches as rain droplets supercool and freeze instantly upon hitting the ground.
A “perfect storm” of appalling weather, persistently high hospital admissions due to flu and a renewed spike in norovirus have put accident and emergency departments under considerable pressure, with the prolonged cold conditions set to put them under even more strain.
Freezing cold temperatures this morning, and staying below zero through today…but it’s the gale force winds which will make you not want to go outside today ❄️ pic.twitter.com/AQSRzUhM61
— Met Office (@metoffice) March 1, 2018
Meanwhile, thousands of children enjoyed a second snow day, with hundreds of schools forced to close their doors, including more than 125 schools in North Yorkshire, more than 330 across Kent and all schools and colleges in the Republic of Ireland.
Many forces warned motorists against driving unless absolutely essential, with Lincolnshire police saying travel on “most roads” was impossible.
Near zero visibility at some point on #M6 between J39 & J40. Drifting snow and snowdrifts are causing problems northbound in the area of Shap Beck split level. @CumbriaRoadsPol responding to several accidents in the area. #StormEmma #CumbriaWeather pic.twitter.com/KlLDdYfYcm
— Cumbria Police (@Cumbriapolice) March 1, 2018
Icy roads and poor visibility led to several crashes, with two collisions reported on the A34 in Hampshire on the south and northbound carriageways, closing both routes, South Central Ambulance service said.
It added the accident caused around seven to eight miles of trapped traffic.
Cumbria Police said it was dealing with “multiple collisions”, including a jack-knifed lorry, and advised motorists to travel at 20 miles per hour, as Northumbria Police advised lorries travelling on the A1 to pull over.
Our officers are still working hard on the A1 in northern parts. Only drive if it is essential. Advice to all HGVs- please pull over if travelling in the area. The roads are extremely bad in parts. #StaySafe #Snowmageddon pic.twitter.com/aGoRJ8oMxz
— Northumbria Police (@northumbriapol) March 1, 2018
The A52 was closed between Boston and Skegness all night, with not even a snowplough able to get through, the fire service said.
Highways England’s head of road safety, Richard Leonard, said: “Gritters are out treating our routes around the clock but it is still important to drive to the conditions when snow is forecast.
“If you need to travel in the morning, make sure you keep your distance and reduce your speed.”
Scotland has faced the brunt of the extreme weather so far, with police warning the public against travel until the severe amber warning passes at 6pm.
Some news outlets reporting correctly that Red warning finishes at 10am – however, the do not travel advice is in place for the severe Amber weather warning until 6pm today! See below for areas affected.
Recovery continues. Plz follow @trafficscotland & @policescotland pic.twitter.com/zv7OZzkM0U
— Humza Yousaf (@HumzaYousaf) March 1, 2018
Hundreds of motorists on the M80 near Glasgow reported being stuck for up to 13 hours, with some spending the night in their cars, and others abandoning their vehicles.
Around 1,000 vehicles were at a standstill, tailing back eight miles in both directions, Police Scotland said.
Major airports including Manchester, London Gatwick and Heathrow told passengers that cancellations loomed, while Glasgow Airport announced it was closed until 3pm.
Our snow teams are battling the elements to keep the airport open this morning ✈️❄️ #BeastFromTheEast pic.twitter.com/zsLZGUBoF1
— Newcastle Airport (@NCLairport) March 1, 2018
Rail services have also been mired by delays with Paddington Station announcing it will be closed from 8am due to severe weather conditions, halting Heathrow Express services.
Nearly all train operators across the UK are warning of cancellations and disruption, advising customers to check schedules before travelling.
More than a foot of snow was dumped in some parts of the country – peaking with 34cm of snow in Wittering, Cambridgeshire.
The Met Office said it had likely been deeper than this in some places, but dry, windy conditions had made it hard to measure.
Temperatures dipped as low as minus 10.3C in Kinloss, Scotland, overnight.