On 26 January 1971, a super cell thunderstorm caused widespread flooding in the Woden Valley in Canberra's south-east. The rainfall started at approximately 7:30pm-7:50pm; up to 100 millimetres was recorded in one hour by private rain gauges in the suburbs of Farrer and Torrens.
Rainwater filled the creek running beside the Woden Valley freeway. As debris blocked the valley, the backup of water sent a flash flood onto the freeway. Two hundred metres wide and one-and-a-half metres deep, the torrent engulfed over a dozen cars.
The incident caused the deaths of seven people, aged between six and 20 years. The Coroner's report found the deaths to be the result of accidental drowning.
The Department of Interior estimated the damage to public and government-owned property at $120,000. The Bureau of Meteorology estimated the total damage bill at $9 million.