A helicopter extinguished an all-night blaze on Te Mata Peak after people defied a blanket ban on fireworks.
Six fire crews were called to the Havelock North lookout after the alarm was raised on Tuesday night but it proved difficult to extinguish on the cliff face.
Hastings District Council principal rural fire officer Trevor Mitchell said it burned all night but was put out at first light yesterday morning with a helicopter using a monsoon bucket.
He had no doubt what caused the blaze.
"There were fireworks there and we had reports of fireworks being set off immediately prior to the fire starting," he said.