DescriptionSouth Canterbury's largest and most expensive flood occurred on 13 March 1986. Many people found themselves isolated and 1160 people were evacuated after twenty-four hours of intensely heavy rainfall.
"The 13 March 1986 flood in South Canterbury is likely to be remembered for some time, with good reason. On the Opihi, Tengawai, Pareora and Waihao Rivers it is probably the largest flood since Febrauary 1868. It was certainly the largest flood this century and greatly exceeded the 21 February 1945 flood. Flood damage to crops and livestock totalled an estimated $60 million" -- Foreword to "Report on flood 13th March 1986" by Frank Scarf
The 1986 South Canterbury Floods (13 Mar 1986). Aoraki Heritage Collection, accessed 19/03/2026, https://aorakiheritage.recollect.co.nz/nodes/view/3350