The Northern Ireland Fire and Rescue Service (NIFRS) has appealed to those building bonfires to “take care” and when they are lit later on Monday night.
More than 250 bonfires have been constructed in loyalist neighbourhoods across Northern Ireland ahead of Monday night's planned festivities. Most are built by stacking wooden pallets.
The fires are traditionally ignited on the eve of the annual Twelfth of July parades - a day when members of the Orange Order parade to commemorate the Battle of Boyne in 1690.
Read more: Over £3K raised for family of tragic Larne bonfire builder John Steele
Speaking to BBC Radio Ulster’s Good Morning Ulster on Monday, NIFRS group commander Mark McGuiness said it was the owners of the land on which the bonfires are built who are responsible for the materials used in construction.
“Bonfires are obviously dangerous. The fire service has no enforcement power around the size of the bonfires being built or the material being used in the site. That would be up to the landowner who ultimately has responsibility for the bonfire that's on their land,” he said.
“Our message is very clear. We want to educate the public just to stay safe around the bonfires, both in terms of building and around the bonfire when it’s lit.”
The build-up to this year's Eleventh Night celebrations has been overshadowed by the death of a bonfire builder in Co Antrim on Saturday night.
John Steele, a window cleaner who was aged in his mid-30s, was killed when he fell from a bonfire in Larne that stood more than 50 feet tall.
A vigil was held at the site of the fire in the Antiville estate on Sunday night.
The bonfire was dismantled earlier in the day and the remnants were lit during the memorial event for Mr Steele.
A flute band played at the vigil while a minute's silence was also held. Wreaths were laid close to the scene of the fatality.
Most "Eleventh Night" fires pass off without incident, with organisers promoting them as family-friendly community celebrations, but a number have become the source of controversy in recent years.
On Thursday night, police said they were treating an incident where petrol bombs were thrown near a bonfire at Adam Street in North Belfast as a hate crime.
The bonfire, which was the subject of failed legal action to stop its erection last year, has been built close to an interface with a nationalist area.
The PSNI plan on the Twelfth being their busiest and most resource intensive day of their year, with the Eleventh Night being second..
There will be 2,500 police officers on duty on the Twelfth, which is around a third of the force's strength.
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Adam Street bonfire: PSNI treating petrol bomb attack as a ‘hate crime’
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Warning over impact of smoke from bonfires for people with lung conditions
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