Yellow warnings for ice and low temperatures have been issued across Northern Ireland on Thursday night.
The Met Office issued an alert, which will be in place between 17:00 GMT on Thursday and 10:00 GMT on Friday.
The warning will be in place for counties Antrim, Armagh, Down, Londonderry and Tyrone.The Met Office has said icy surfaces could lead to difficult travel conditions.
There may be some icy patches on some untreated roads, pavements and cycling paths and conditions could lead to an increased risk of injuries from slips and falls.
As the cold weather continues, NI Water has reminded the public to be aware of the risk of frozen pipes, as they pose a risk to properties and possessions.
Advice includes wrapping your pipes and water tanks up, fixing dripping taps, knowing how to turn off your property’s stop tap, checking your central heating boiler has been serviced and leaving the heating on low if you are going away.
In the Republic of Ireland, forecaster Met Éireann has issued a low temperature and ice warning for the country.
The warning will be in place from 18:00 local time on Thursday to 11:00 on Friday.
The forecaster warned that conditions will be very cold with widespread frost and ice as temperatures fall to -3 degrees or below in many areas.