Revellers are being urged by Yorkshire Ambulance Service (YAS) to make “wise choices” and avoid excessive drinking as its crews prepare for what is known as “Mad Friday”.
As the festive party season peaks on the last Friday before Christmas, the service warned it was expecting to field up to 150 calls an hour between now and early January.
Partygoers were also asked by YAS to look after friends to ensure people who needed life-saving emergency care could receive it.
Marc Thomas, from YAS, said: “We are already seeing system-wide increases in demand, largely due to winter-related illnesses like flu and respiratory problems and this will undoubtedly rise further over the next few weeks.”
Mr Thomas, YAS deputy chief executive and chief operating officer, said: “By making wise choices and taking extra care during the festive period, especially on exceptionally busy nights like ‘Mad Friday’, you can help keep ambulances available for those whose lives truly depend on it.”
Meanwhile, YAS appealed for paramedics and ambulance staff to be treated “with the respect they deserve”.
“They are here to help people when they are most in need,” Mr Thomas said.
“Very sadly, they face the possibility of violence, assault and aggression every time they are on duty, which is completely unacceptable.
“Thank you for your support and understanding this winter.”