Clear spells overnight into Thursday will see the mercury dip below zero across much of the county, with warnings that icy patches are likely to form on untreated surfaces. And showers on Thursday could lead to wash-off where roads and paths have been treated, the Met Office added. The weather warning will remain in place from 7pm tonight (Wednesday) until 10am on Friday. A spokesman said: Clear spells this evening and overnight will allow temperatures to widely fall below freezing allowing icy patches to form, especially on untreated surfaces such as pavements, cycle paths and some minor roads. Further showers will also occur which could lead to localised wash-off where roads have been treated. As part of the cold weather alert, Cambridgeshire County Council is asking residents to take look out for others and to take extra care. A cold weather alert is triggered when severe weather is occurring, meaning average temperatures have dropped to two degrees centigrade. Val Thomas, consultant in public health at Cambridgeshire County Council, said: Remember to check weather forecasts and plan the day around them. Take extra care if outside to prevent any accidental slips from icy snowy pavements. When indoors it is critical that people stay warm, particularly if youre 65 or over, have long term health conditions or young children. Wear lots of thin layers, eat regular warm and well-balanced meals and remember that moving about will help keep you warm.