Dublin Fire Brigade has said it has received over 750 calls so far tonight, on what is one of the busiest nights of the year for emergency services.
Most of the calls are fire-related, and mainly in relation to bonfires.
Dublin Fire Brigade says there has been no injuries so far tonight, and no major incidents to report.
Bonfires are also being dealt with in southern and western parts of the country, and no major incidents have been reported.
People were urged to only attend organised Halloween events, and gardaí asked for parents to ensure children do not have fireworks in their possession.
The Assistant Chief Fire Officer at Dublin Fire Brigade called on people to keep away from illegal bonfires and fireworks.
Speaking on RTÉ's News at One, Greg O'Dwyer said the fire brigade did not want to be a killjoy, but wanted everyone to enjoy the festivities.
He also warned that there was no safe distance to keep away from a bonfire.
Last year, Dublin Fire Brigade received 1,100 calls throughout 31 October.
Over the last number of weeks Dublin City Council and the gardaí have been confiscating stockpiled bonfire material in early morning raids.
Significant amounts of material had been recovered.
STOP, DROP & ROLL. If you find yourself in a position where your costume, or clothes, catch fire do the #Neymar. Running will only fan the flames and help the fire spread. STOPPING, DROPPING & ROLLING will smother the flames. pic.twitter.com/SjgdPOT3Pe
— Dublin Fire Brigade (@DubFireBrigade) October 30, 2018
