Snowfalls have shut dozens of Scottish schools and caused difficult driving conditions and flight cancellations.
Scottish Borders Council has confirmed that all 74 schools in the region will be closed on Tuesday due to the overnight forecast.
Edinburgh, Glasgow and Aberdeen airports have cancelled more than 130 flights and some flights to Heathrow were being diverted to Prestwick.
Weather warnings are in place for many southern and eastern parts of Scotland.
By mid-afternoon on Monday a total of 33 outbound and 30 inbound flights had been cancelled at Edinburgh Airport.
At Glasgow, 23 outbound and 21 inbound flights had been cancelled with 12 outbound and 13 inbound flights cancelled in Aberdeen.
The manager of Prestwick airport said it expected to handle about 1,000 extra passengers as a number of long haul flights due to land at Heathrow were being diverted there because of the conditions south of the border.
Passengers on the services from the United States, the middle east and the far east were being put up in local hotels overnight.
Many other services are subject to delay and anyone intending to travel south has been advised to check their flight status before leaving for the airport.
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Dozens of schools across Scotland have been directly affected by the snow.
The worst-hit area appears to have been the Scottish Borders where 33 primaries, four secondaries and three nurseries were closed.
The poor forecast overnight has prompted the local authority there to shut all its schools on Tuesday.
In Dumfries and Galloway, a total of 19 schools - mainly in the east of the region - were closed.
Fife Council has also reported four primary school and three nursery closures.
In South Lanarkshire six primaries and one secondary school have shut early.
In Falkirk, Carrongrange special needs school, Limerigg PS and the assisted learning unit at Maddiston PS were also shut.
Langside college in Glasgow was due to close at 1330 GMT with all night classes cancelled and Motherwell College was also closed.
The Highways Agency said people should only take essential journeys
In Aberdeenshire, the B974 Banchory to Fettercain Road was closed at Cairn O'Mount because of snow.
The M77 was badly affected from Junction 5 near Newton Mearns through to the A77 in Kilmarnock.
Many ferry services faced disruption due to the weather.
The Met Office has weather warnings in place for Grampian, Strathclyde, Central, Tayside and Fife as well as Dumfries and Galloway and Lothian and the Borders.
However, despite the cold snap, Inverurie Locos' Scottish Cup fourth-round tie against Motherwell has been given the go-ahead for Monday evening at the fifth time of asking.
The Harlaw Park pitch passed an inspection on Monday morning after the tie was called off on four occasions due to the frozen pitch.
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