Altnaharra in Scotland is UK’s coldest spot
Heavy snow and sub-zero temperatures are again taking their toll on schools, roads, rail and air travel.
More than 250,000 pupils across the country missed lessons on Wednesday and schools in many areas have already said they will remain closed until Monday.
The east of the country is again experiencing the worst of the snowfall, with police in Tayside urging motorists not to drive unless it is vital.
Edinburgh Airport will remain closed until at least 0600 GMT.
Temperatures overnight were expected to plummet to -22C in Altnaharra in the Scottish Highlands.
Across most other cities and towns the temperature fell to nearer -6C.
Heavy snow in parts of Aberdeenshire, Tayside, Lothians and Borders will again make travel conditions extremely hazardous.
Some school pupils have already had three days off classes this week.
Midlothian Council said its 37 schools would be shut for the rest of the week due to the weather.
All state schools in West Lothian, East Lothian and Scottish Borders will also be closed until Monday.
All schools in Falkirk and the Dundee will be closed on Thursday.
A spokesman for Edinburgh Airport, which has been closed for most of the past two days, said they hoped to re-open runways at 0600 GMT.
Dundee airport was also closed on Wednesday.
Train passengers also faced delays and cancellations.
The East Coast mainline service has been cancelled north of Edinburgh.
On Wednesday, Justice Secretary Kenny MacAskill said: “Scotland is experiencing its worst snowfall at this time of year since 1965, but we are seeing the country pulling together to help overcome the extreme conditions.”
Edinburgh City Council said Scotland’s capital had seen the “worst snowfall since 1963” and staff have been out in “all weather conditions” to help clear snow from pavements and roads.
Tayside Police today urged people in the region not to venture out onto the roads unless their journeys are “absolutely necessary”.
The force said the roads situation had again deteriorated with “white out” conditions on the A9, M90 and A90 and snow posing difficulties for all types of vehicles.
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