Flooding is Canterbury’s most common hazard. Our large braided alpine rivers rise in the Southern Alps and flow across the Canterbury Plains to our eastern coast and can flood during northwesterly rainstorms, often when it is warm and sunny on the Plains. We also have many smaller rivers that flow from the foothills of the mountains or the Plains to the sea, which can flood during southerly or easterly rainstorms. Flooding can also happen in low-lying coastal areas from storm surges or big seas.
Floods can be dangerous if water is deep or travelling fast, if it's risen very quickly, or if it's carrying debris like trees, gravel or building materials.
Prepare your home
Stay out of floodwater
If you have to evacuate
If your property is damaged
Dealing with flood damage around the home