Clinics which were to have been held at the Letterkenny Vaccination Centre this morning have been cancelled, as have walk in clinics.
Those with appointments will be contacted by text with rescheduled dates as quickly as possible.
A decision will be made later on whether the clinic will open this afternoon.
Covid test centres in Letterkenny and Donegal Town are closed until lunchtime.
Emergency Ophthalmology clinics at St Conals in Letterkenny have been cancelled, as have day services at Killybegs Community Hospital.