Auckland is in line for another deluge of rain tomorrow after 5pm, with concerns it could have even worse impacts on the region after Friday's damage.

Educational facilities will be closed on Tuesday for the next week, businesses have been advised against opening, and the army may be called upon to help with sand-bagging.

Auckland mayor Wayne Brown says this weather is concerning and that he's ensuring Auckland will be properly prepared for the extreme rain and flooding.

"We've got all the emergency services prepped and ready, and in addition to that, I've asked Minister Henare to keep the army alert in case we need them as well for sand-bagging. The next two days look quite challenging."

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