The Cold Weather Alert for Eastbourne has been upgraded to Level 3.
It means the likelihood of severe cold weather is 90% possible. Although today (5 January) is due to be sunny, temperatures will feel close to freezing with the wind chill and will feel like -2 overnight.
Those with long-term health problems and the elderly could be at risk owing to the cold weather and are being urged to take precautions to make sure they keep warm.
The warning has been issued by ColdAlert.