The wintry bursts could affect people with underlying health conditions and elderly people the most
The arrival of a cold snap in Northern Ireland could place some people's health at risk.
The Public Health Agency is urging people to look after themselves and take actions to stay health this winter.
Over 65's and people with long-term health conditions are most at risk from the cold weather and winter viruses.
Dr Carolyn Harper is the Director of Public Health with the agency.