Scotland battered by worst storm for 10 years
8 December 2011 Last updated at 18:32 GMT
Police have told people in Scotland not to travel, as winds of up to 165mph (264km/h) affect the country, leaving more than 30,000 people without power.
As the Met Office issued its highest warning, a red alert, hundreds of schools have shut and bridge and road closures are causing disruption.
England, Wales and Northern Ireland are also being hit by wind and rain.
Winds of up to 90mph (144km/h) and possible blizzard conditions are expected in north Scotland into Friday.
James Cook reports.