395 patients are being treated on trolleys in hospitals across the country today - the highest figure since the Covid-19 pandemic began.
Cork University Hospital is the most overcrowded with 50 on trolleys, followed by 42 in University Hospital Limerick.
Galway, Sligo and Mayo University Hospitals are also among the 6 most-overcrowded.
The INMO is reporting 37 patients on trolleys today at University Hospital Galway, 29 at Sligo Hospital and 27 at Mayo University Hospital.
The Irish Nurses and Midwives Organisation says hospitals are at risk of becoming Covid hotspots, due to over-crowding and poor ventilation.
The union wants to see proper audits of every healthcare workplace to ensure ventilation meets a high standard.