"People are asked to take care when passing through Lake Rd so emergency services can work safely."
The local Himatangi Beach Volunteer Fire Brigade is among those working at the scene.
People warned to stay away
"For safety reasons, can all locals please ensure that they stay out of the dunes and forestry between Himatangi and Tangimoana until further notice," a note on the Himatangi Beach Volunteer Fire Brigade Facebook page said late last night.
Meanwhile, campers preparing to head out to the area for the long Waitangi weekend were told by the Himatangi Beach Holiday Park to stay away.
"Hey campers, please don't head into the dunes or forestry between Himatangi and Tangimoana this weekend.
"She is a pretty big job!"
Himatangi resident Victoria Edmonds said last night that the sound of helicopters was constant.