The bad weather has caused a huge drop in the amount of blood being donated.
450 units were lost last week due to cancelations with the stormy conditions.
Blood donors are being urged to make an extra effort to attend clinics next week.
Spokesperson for the Irish blood transfusion service is Paddy Bowler:
You can find out where the clinics are at GiveBlood.ie or call them on 1850 731 137