Motorists have been stranded and hundreds of schools closed on Monday as the UK continues to shiver in the grip of freezing temperatures and heavy snow.
Forecasters warned there was no sign of a let-up in the icy conditions, with several more centimetres of snow continuing to fall in the North East and parts of eastern Scotland over coming days.
The rest of the UK will also be affected, with snow moving south, and only parts of western Scotland and Northern Ireland free of snow showers by Tuesday afternoon, forecasters said.
In Scotland, more than 600 people were offered emergency accommodation at a sports hall in Perth after they were stranded overnight on the A90, M90 and A9 amid blizzard conditions.
The A9 between Dunblane and Perth, one of the busiest roads in Scotland, was closed on Sunday night, with drivers urged by Central Scotland Police to avoid the roads throughout the rest of the force area unless absolutely necessary.
All schools in Dundee, West Lothian and Shetland were closed and around 50 were forced to shut in York and North Yorkshire. Several schools in East Yorkshire also closed for the day.
So far Scotland and the North East have been worst hit by snow, with more than 16in (40cm) in parts, and police have advised people to stay indoors for all but essential travel.
Forecasters warned that the rest of the country is likely to be blanketed this week. The severe conditions could also last well into next week, with rain, sleet and snow.
Forecaster Brendan Jones said snow would be moving south across the UK with many areas starting Tuesday morning with a covering of snow.
A further "several centimetres" of snow would fall in the North East and parts of eastern Scotland over the next few days, he added.