The incidence rate in each Cavan, Donegal and Monaghan has sky-rocketed in recent weeks, with the three counties likely to face more restrictions.
The Cabinet is meeting today to discuss strict new measures introduced in Northern Ireland, and what implications they may have on the Republic.
It was confirmed this afternoon that pubs and restaurants in the north would close for four weeks, with schools shutting for two.
And among the topics being debated here is whether or not to move certain border counties up a phase in measures, which could see some areas under Level Four restrictions.
It comes after Tanaiste Leo Varadkar has said that a decision on further restrictions in border counties could be made as soon as today.
Speaking earlier, the Fine Gael leader said any measures would be influenced by an announcement on new restrictions in the north.
And these restrictions would hit Cavan, Monaghan and Donegal first, after soaring cases in recent weeks.
Here are the incidence rates for each of the three counties:
*Cavan: 412.2 (314 cases in past two weeks)
*Donegal: 354.9 (565 cases in past two weeks)
*Monaghan: 312.8 (192 cases in past two weeks)
*National: 177.2 (8,436 cases in past two weeks)
Health officials are set to meet tomorrow to review the situation, but Mr Varadkar said a decision could be made today on any new restrictions that will be made in this area.
He told Pat Kenny on Newstalk: "I haven’t heard yet what the announcement is from Stormont.
"Once we find out for sure what the Northern Ireland Executive has decided, Government will then respond to that and we will see whether we need to take similar measures or what actions we need to take in relation to the border counties.
"We do out best to align and cooperate with Northern Ireland as best we can but, as you know, the Northern Ireland Executive has not favoured an all-island approach or a 32-county approach but we do our best to coordinate and cooperate as much as we possibly can.
"As your listeners will know, the incidence of the virus in Donegal, Cavan and Monaghan in particular is very, very high.
"We will have to make a decision probably sometime today as to whether we need to respond with increased measures in the border counties as well."
