Christchurch New Zealand flooding? Its winter and its flat there, lift valuables off floor could be more.

Looking at this map. moister could be dragged from the tropics towards New Zealand and there is an second eddy in the Tasman sea that could block the eddy from moving east and away.

The southern Alps block the rain and Christchurch City looks to be getting a good steady heavy rain storm. Heads up, watch the news in New Zealand for flooding pictures in the morning.

Just a guess...I don't know. Interesting to me.