Met Éireann put in a status red snow-ice warning in place for large parts of the east coast after heavy overnight snowfall.
Local Link Wexford were forced to stop all services due to snow and ice conditions making many rural routes treacherous for travel.
In Dublin, Luas and Dublin Bus services are severely curtailed, while Bus Éireann said its services were also majorly disrupted.
After snow accumulations of between 5 and 10cm since Tuesday night, Met Éireann warned that total snowfall up to midday on Thursday may reach 25cm in the red alert zone.
A separate status orange warning is in place for Wexford, Cork and Waterford where forecasters said heavy snow showers would continue today, tonight and during tomorrow with accumulations up to 8cm. All Local Link Wexford routes have been cancelled until further notice. The orange alert was put in place at 6am and is also effective until midday tomorrow.
Storm Emma is expected to move over Ireland on Thursday afternoon causing further heavy snow across large parts of Ireland with the cold weather set to last until the weekend at least.
Local Link Wexford ask that you look in on your neighbours especially the elderly in rural isolate areas to ensure their safety.