Dubliners have been warned to expect delays if they have to ring an ambulance in the coming days.
And some are being urged to contact their GP, go to a minor injury unit, or look after issues themselves before calling 999 to help ease the pressure on the system.
The National Ambulance Service and Dublin Fire Brigade have also asked people to call back and let them know if an ambulance at a scene is no longer required.
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National Ambulance Service Director Robert Morton said: “Please bear with us over the coming days as we continue to be extremely busy.
"If the situation is not serious or life threatening consider contacting your GP, a minor injury unit, your pharmacist or self-care.
"Our staff continue to work incredibly hard trying to deliver normal health services and respond to the pandemic.
"The HSE is incredibly thankful for the continuing efforts of all of our staff in what remains challenging circumstances."
Chief Fire Officer of Dublin Fire Brigade Dennis Keeley added: “We are experiencing very high demand for ambulances at present.
"We want to ensure that the sickest, that is, the most critical patients get an ambulance in a timely way.
"We thank you for your understanding in helping us serve the sickest in our community.”
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