Signs of very hot gases have driven up the alert level, though what is causing the increased activity is uncertain.
Police have said they are not treating last week's discovery of a body in a Rotorua hotpool as suspicious.
A wet and windy front is set to cover the country, with flooding and slips possible in some regions.
The school has announced a number of new measures in the wake of a WorkSafe probe aimed at creating 'the right environment'
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