Get ready as the country is set to face its coldest week in years.
It is being dubbed as the 'polar vortex' and temperatures in and around Borehamwood and much of the UK are not expected to reach above freezing from Sunday night onwards and it will only get colder as the week progresses.
As the week goes on, daylight temperatures will fall below 0 degrees but it is likely to feel like -10 or even -15 because of a chilly icy wind.
Despite the freezing conditions, there is no guarantee of snow,
Tom Defty from the Essex weather centre said: "This could be a three to four week cold spell and something we have not seen since December 2010. They, at the Met Office, are saying this is going to be a severe event.
"We could get to low temperatures we have not seen for a very long time."
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