Watch: See how fast a river can flood


While Christchurch was mostly spared from the wrath of ex-Cyclone Gita, this river in the Waimakariri district shows that many other areas received high levels of rainfall.

In this video, the Eyre River transforms from a dry riverbed to a flowing river in just minutes.

Crews from the Waimakariri District Council captured the footage from Diversion Bridge on South Eyre Rd.