The Government has boosted Auckland's Mayoral Relief Fund by $1 million as the upper North Island prepares for another battering from Mother Nature.

Northland has declared a precautionary State of Emergency, valid for seven days.

Red rain warnings are in force in the region, as well as for northern Auckland and the Coromandel Peninsula.

Orange Warnings apply to the rest of Auckland and Great Barrier Island tonight, and tomorrow for the Bay of Plenty, and parts of Tairawhiti.

North Shore councillor, Richard Hills says in his area, the rain has cleared but the wind's picking up- which is risky to the already soft and unstable ground.

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