The Accident Compensation Corporation is asking people to take care around fireworks this Guy Fawke's.
The ACC says it received 445 claims for injuries involving fireworks last year, with over half of them burn-related.
ACC general manager of insurance and prevention services John Beaglehole says people need to show common sense around fireworks by making sure they're stable, lighting them well away from people and buildings and by following instructions.
Fireworks went on sale to the general public on Saturday ahead of Guy Fawkes celebrations on Tuesday.
Meanwhile, the national rural fire officer says staff are on alert for any blazes from fireworks.
Murray Dudfield says he supports public fireworks displays because they are managed.
"We're comfortable that the vegetation in many areas is not drying out sufficiently to cause any concern, but we're always concerned with the use of fire works - public displays they are the things that we support."
He says permits to light bonfires are needed in some areas, including the upper North Island, where restrictions are in place.