Roads on the Coast and parts of Wallonia could be covered in sheets of ice between Saturday night and Sunday, the Royal Meteorological Institute (RMI) warns.
The warning covers the provinces of Liège, Luxembourg and Namur in addition to the Coast, Belga News Agency reports.
The RMI has placed these areas on 'code yellow' from 20:00 on Saturday to around 10:00 on Sunday.
Frost is expected in most of the country on Saturday night. Parts of roads that are still wet from light rains or melting snow could then ice over.
