Donegal will enter level three Covid-19 restrictions from midnight tonight.
Businesses in the county were given a little more than 24 hours to prepare for the change.
It will be the same restrictions as are in Dublin - including a ban on indoor dining.
However, pubs that don't serve food will be allowed to open with outdoor service only.
Acting Chief Medical Officer, Ronan Glynn, says a high spread of Covid-19 in Derry has had an impact on Donegal:
The 14-day incidence rate of Covid-19 in one area in Donegal is the highest in the country.
The rate in Stranorlar is 336 per 100,000 population, which the Taoiseach says is particularly concerning.
Dr Denis McCauley is a GP in the town - he says the current rate is alarming.
The Taoiseach Micheal Martin warned last night of similar measures in other counties and cities where the incidence rate is rising. “To be honest”, he said, we could have similar announcements for other areas in the coming week, if the numbers keep rising”.
Dr Glynn specifically warned of possible escalations in other counties urging people in Galway, Wicklow, Kildare, Waterford, Cork and Louth to pay particular attention to public health advice.