Snowstorms have hit the UK on the night of Dec. 26 and morning of Dec. 27, paralysing traffic on major thoroughfares, leaving thousands of homes without power, and causing flight delays and possible cancellations.

“The A30 in Cornwall is closed both directions between the A3074 and the B3301 due to an incident,” it warns.

Severe weather conditions are affecting the A14 highway in both directions between the M6/M1 and J3, Northamptonshire Police say.

Authorities are urging drivers to seek alternative routes.

Police told reporters the accident was likely caused by the poor driving conditions.

“There has been an accident involving a lorry. Unfortunately, all lanes are currently blocked. Police and Highways are aware and are currently dealing. Please make alternative travel arrangements. Updates to follow,” police tweeted, according to SkyNews.

Another accident had closed the M5 in Gloucestershire. The police tweeted this photo along with a warning to avoid driving in the area if possible.

Luton Airport issued a warning to travellers to expect possible delays and/or cancellations due to sleet and snow. Passengers are also advised to check with their airline for current flight status.

A delay of over two hours reportedly affected Luton passengers to allow for plane de-icing.

Birmingham Airport flights were suspended in the early hours of Wednesday, with passengers being requested to check with airlines for flight status updates.

Some flights due to land at Birmingham were apparently put on holding patterns to allow for runways to be cleared or for possible diversion to backup airports.

Western Power Distribution (WPD) confirmed nearly 14,000 homes were without electricity across southwestern and central parts of the country, according to SkyNews.

Here is a WPD incident map.

In addition, power supply company SSE stated that approximately 10,000 of its customers are without power, according to the news outlet.