Close to 40 firefighters are at the scene after being alerted to the fire at 1.40pm. By about 3pm, a helicopter with a monsoon bucket arrived. The fire has grown to 1sq km in size.
Resident Cynthia Ngawaka said all the neighbours had come out of their houses smelling smoke before noticing the fire, which had since spread significantly.
"When we got back home the smoke was real thick. It's quite a sight to behold, when you have a line of flames like that. It's like that licking type of flame too. It's burning the mangroves.