1967 Portugal floods
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The 1967 Portugal floods (the "great floods") were flash floods that took place in 25 and 26 November 1967, Portugal, in the Lisbon metropolitan area, affecting a total of 14 municipalities.[1][2] It was the deadliest flood recorded in Portugal, with 500-700 deaths, more than half of all similar-cause fatalities in 100 years.[2] It was also the deadliest natural hazard in Portugal since the 1755 Lisbon earthquake.[2]