Covid-19 case numbers are growing by more than 3 percent each day, while the virus' reproduction number is above one.
Yesterday, the Department of Health announced 783 new cases - the highest figure in five months - and the Delta variant now accounts for 80% of cases reported here.
HSE CEO Paul Reid says he expects case numbers to continue to rise, but said the vaccination rollout is having an impact.
Latest figures show Mayo recorded 122 new cases of the virus over the past week.
There were 211 new cases in Galway, 68 in Sligo, 58 in Roscommon and 24 in Leitrim in the past week.
Sligo, Mayo and Roscommon now have 7-day rates above the national average.