Alpine riverbed alert

Last updated: 7.17am Fri, 4 Sep 2026

Heavy rain has been falling overnight in the headwaters of the major Canterbury alpine rivers (Rangitata, Rakaia, Waimakariri, Hurunui, and Waiau-uha). The rain is forecast to gradually ease throughout the day (Friday). Flows are beginning to increase in the upper parts of these rivers, and will increase in the lower parts later today.

Beware of increasing flows if you are working or recreating in these riverbeds. Out-of-river flooding from any of these rivers is unlikely. This message will only be updated if the situation changes significantly.

For more information view our river flow data or rainfall data.