Auckland's mayor is giving the Council until mid-October to implement recommendations from the report into the devastating January floods.
It found council emergency management was unprepared for such a quick and massive event, and pointed out communication issues from leaders.
The Council has been told it needs better communications technology, more community outreach and to practice emergency exercises.
Wayne Brown says his mistake was assuming he knew what others were doing that night.
"Oh I knew what I was doing, but what I was doing was in the office waiting around to be informed by the emergency management staff as to what was happening. But it turned out, we weren't."
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