Some counties in Ulster received heavy snowfalls overnight and today including counties Cavan and Monaghan as blizzard conditions caused by Storm Emma left thousands of homes and businesses without power.

In Cavan, the council said the combination of high winds and snowfall overnight led to snow drifts of up to two metres in places.

The county is still experiencing unprecedented severe weather conditions and significant accumulations of snow.

The council has warned that, "routes that may appear passable at first may be blocked by drifting snow further down the road, leaving motorists stuck. Local and regional roads and housing estates may also be treacherous".

"Cavan County Council therefore urges drivers to continue to stay at home this morning," said the council.

In Monaghan, the council commenced ploughing and gritting of national roads at 6am this morning.

The council said: "All national primary and national secondary roads are open and passible including N2 Dublin - Derry road; N12 Monaghan to Tyholland, N54 Monaghan to Clones and N53 Castleblayney to Culloville roads.

"Some regional roads are passable with care."

Donegal Airport is closed today due to weather conditions in Dublin.

It is planned to reopen tomorrow morning and hopefully have flights back on schedule by midday.

The Mourne Mountain Rescue Team said it was out from 5am helping essential staff reach Daisy Hill Hospital in Co Down.

Conditions on the main road from Belfast towards Dublin were poor due to the weather.

Many minor country roads near Moira, Co Down, were impassable due to large drifts.

The Belfast airports were open, but passengers were advised to check with their airlines.