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1818 Giétro Glacier Flood
- When
- June 1818
- Where
- Valley of Bagnes
A lake outburst flood from the Giétro Glacier killed 44 people in the valley of Bagnes, marking a major disaster in Swiss history.
The flood occurred in June 1818, following the formation of an ice cone in 1816. The natural dam failed, sending water down the Dranse. The village of Bagnes was reached ten minutes later. Alerts to Martigny were issued before 18:00 but were too late. The event killed 44 people.
Sources
- Giétro Glacier Wikipedia, revision of 2026-02-18
- Bagnes Wikipedia, revision of 2026-09-14
Machine-drafted from the cited Wikipedia passages and checked by a reviewing model, not by a human editor. Every passage cites the revision it was written from; dates and places follow those passages.