People in many industries return to work on Tuesday after the Christmas break.
Commuters across Ireland have been warned to look out for freezing conditions on Tuesday, with overnight temperatures set to plummet as low as -4 degrees.
Met Éireann has warned that patches of freezing fog may develop overnight, given the cold and calm conditions.
AA Roadwatch have warned motorists, particularly heading towards the south of the country, to take care.
ROAD CONDITIONS: KILDARE: Black Ice remains on Athy/Kilcullen Rd.Icy at Wicklow county bounds on Blessington/Naas Rd https://t.co/9H7eVw9Wjc
— The AA Ireland (@aaroadwatch) January 2, 2017
Motorists in Clare, Kildare and Wicklow have been told to look out for black ice.
Met Éireann have said that temperatures will rise later in the week.
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