The increase has happened in the last 24 hours.
There's been a surge of almost 50% in the number of people on trolleys at Naas General in the last 24 hours
The Irish Nurses and Midwives Organisation says that, on Wednesday, 11 patients were on gurneys in the Emergency Dept.
Today, that has risen to 20.
Nationally, 402 people are being treated on gurneys.
Cork University Hospital, where 50 people are on trolleys, is Ireland's most overcrowded hospital today.