It said that under such "extreme" conditions, severe disruption to the transport network was "inevitable".
Hyundai, South Korea's top carmaker, had warned it was facing severe disruption to production.
International flights are subject to severe disruption, and US air space is still closed to civilian flights.
Southern Trains warned of "severe disruption" and Southeastern was running a revised timetable.
Heavy snow is falling in Wales, where a rare Met Office red warning for severe disruption has been issued.
Severe disruption to platinum group metal mining is expected to reduce supplies from South Africa by over 600, 000 oz.
The aftermath of the devastating earthquake and tsunami that plagued Japan in March hindered output as supply chains faced severe disruption.
He said that while the road and rail networks had recovered quickly from heavy snow, Heathrow Airport had experienced severe disruption.
School and college services are being prioritised but First is advising travellers to expect severe disruption and cancellations on other services.
In Worcestershire, there is also severe disruption and the council said it was sending out snow ploughs instead of gritting the roads.
Many drivers were stuck overnight on the M8 after heavy snow caused severe disruption to the route that links Glasgow with Edinburgh.
The volcano has already caused severe disruption to flights in South America, with planes grounded for several days in Chile, Argentina, Uruguay and Brazil.
The committee was told that the government was preparing a new "regulatory regime" for airports, following severe disruption at airports including Heathrow and Gatwick.
In North Wales people are advised not to use rail services on the coastline between Chester and Holyhead, due to severe disruption and cancellation of services.
Arriva Trains Wales said it also put on a bus service and advised passengers to "only make essential journeys due to the severe disruption caused by flooding".
The debris and unexploded munitions clogging the river are causing severe economic disruption.
Heavy snow in north-western Europe is causing severe travel disruption, including the cancellation of hundreds of flights via Frankfurt and Paris.
The club wanted to hold a parade on Thursday, the day after the final, if it won, but the Metropolitan Police, Transport for London and local councils said a parade on a weekday evening "would bring severe rush hour disruption and chaos to west London".
But despite the huge disruption caused by the severe flooding, the minister also stressed that "Ceredigion is very much open for business".
The disruption could be especially severe if the upstarts not only make calling dirt-cheap or free, but also find ways to help consumers with jobs such as simplifying their communications as a whole or meeting their needs for privacy.
By the 29th the severe conditions were beginning to cause widespread disruption, with hundreds of school closures and delays to road, rail and air journeys.
Amber severe weather warnings, which mean be prepared for disruption and only travel if necessary, are in place across large parts of central, western and southern England and Wales, as well as Northern Ireland.
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