fukutyphoo

Fukushima nuclear power plant in Japan had a system designed for a 1 in 100 year accident. It happened after 8 years. https://www3.nhk.or.jp/nhkworld/en/ondemand/video/3016087/ PS, this is a great video about the typhoon that caused the disaster.

Disasters are Black Swan Events https://en.wikipedia.org/wiki/Black_swan_theory in Talebsbook he explains (ok it's a theory) that rare events happen commonly.

See also Terry Pratchet "one in a million chances happen nine times out of ten"