Workers at Dublin Fire Brigade have voted overwhelmingly in favour of strike action in a row over plans to break up the ambulance and dispatch service.
97% of SIPTU workers voted for the industrial action.
The main issue is proposals by the city council to remove the ambulance service and call centre from Dublin Fire Brigade and instead merge them with the HSE's National Ambulance Service.
SIPTU is also angry at the under-resourcing of the ambulance service in the city.
SIPTU Public Administration and Community Organiser Division, John King, said the move "Would compromise the safety of our members, who deliver this critical lifesaving service, as well as expose the public to increased risk.”
A strike committee will meet next week, to discuss what course of action they will take to try and stop any changes to emergency services run by Dublin Fire Brigade.