Age Action Ireland is urging communities to ensure that older people remain safe and well in their homes during the current cold spell.
Spokesman Eamon Timmins has appealed to people to check up on the most vulnerable, especially those living alone.
Temperatures are forecast to fall below 0C in many areas again tonight.
Met Éireann has forecast more wintry showers of rain, sleet and snow tonight - mainly across Munster and Ulster at first and across the midlands and east later.
It says that snow will stick in parts, especially on higher ground.
The south of the country was worst affected by bad weather overnight.
Up to 15cm of snow was reported in some parts of Co Kerry and the Conor Pass was impassable.
Commuters in Co Cork also experienced difficulties this morning, particularly in Macroom, Millstreet, Mallow, Rockchapel and Ballyvourney.
Counties Waterford, Wicklow, Meath, Kildare and Cavan also had to endure icy and snowy conditions earlier - with motorists being advised to avoid the Wicklow and Sally Gaps.
Meanwhile, Aer Lingus and Ryanair cancelled a number of Irish flights due to continuing bad weather conditions across Europe.
Intending passengers are advised to check their airline's website for further details.
A number of other flights have also been delayed due to poor conditions.
Aer Lingus cancelled flights between Dublin and Milan Linate, Dublin and Munich, Dublin and London Heathrow and Cork and Paris.
Ryanair cancelled a number of flights to and from London Stansted; including routes from Shannon, Dublin, Knock Ireland West and Derry.