# Monviso environmental instability and landslide

> Live situation record from CLSTR: https://clstr.news/situations/monviso-environmental-instability-and-landslide
> Updated: 2026-09-03T11:51:41.000Z. Sources: 24. Developments: 2.

On September 1, 2026, a major landslide occurred on the north-east slope of Monviso in Piedmont, Italy, near the Quintino Sella refuge. The event produced a loud boom and a massive cloud of dust and debris. While a foreign hiker was initially reported missing after failing to reach the refuge, authorities confirmed that no people were directly hit by the landslide. In response, the municipality issued an emergency ordinance to close the trail between Lago Chiaretto and Colle di Viso to protect hikers from further rockfalls. The Piedmont Region also announced a specialized meeting with technical experts and Alpine Rescue to evaluate monitoring and safety measures.

Following the event, environmental alerts have highlighted broader climate-related instability. Legambiente’s Glacier Caravan reported that the Coolidge glacier is nearly extinct and has been reclassified as a glacieret. Experts have noted frequent rockfalls on Monviso’s northeast wall and expressed concern regarding the health of the Po river, which originates at the mountain’s base. Vanda Bonardo, national Alps manager for Legambiente, emphasized the connection between mountain ecosystems and the plains, calling for urgent European governance to manage mountain resources and vital water reservoirs.

## Claims

- Alpine Rescue confirmed that no people were involved in the landslide. (disputed by 4 sources)
- A foreign hiker was reported missing after failing to arrive at the Quintino Sella refuge. (disputed by 3 sources)
- The Coolidge glacier is nearly extinct and has been reclassified as a glacieret. (corroborated by 4 sources)
- The northeast wall of Monviso is experiencing frequent collapses. (corroborated by 4 sources)
- The Po river, which originates at the foot of Monviso, is suffering due to climate change. (corroborated by 4 sources)
- Rock glaciers are acting as water reservoirs in periglacial areas. (corroborated by 4 sources)
- There is an urgent need for European governance regarding mountains and water resource management. (corroborated by 4 sources)
- The Piedmont Region is convening a meeting within the regional observatory on climate change to discuss the Monviso event. (corroborated by 3 sources)
- A large landslide detached from Monviso on the evening of September 1, 2026, near the Quintino Sella refuge. (corroborated by 2 sources)
- The municipality issued an ordinance temporarily closing the trail between Lago Chiaretto and Colle di Viso. (single source)

## Timeline

### 2026-09-03: Monviso faces climate crisis alerts regarding glaciers and water

Legambiente warns of climate crisis impacts at Monviso, citing the near extinction of the Coolidge glacier, frequent rockfalls, and threats to the Po river's water sources.

9 sources. https://clstr.news/cluster/monviso-faces-climate-crisis-alerts-regarding-glaciers-and-water

### 2026-09-01: Monviso landslide strikes near Quintino Sella refuge

A large landslide hit Monviso near the Quintino Sella refuge on September 1. While no casualties are confirmed, a foreign hiker is missing. Piedmont authorities are convening to discuss climate monitoring.

15 sources. https://clstr.news/cluster/monviso-landslide-near-quintino-sella-refuge-triggers-search-for-missing-hiker

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Cite as: Monviso environmental instability and landslide. CLSTR, https://clstr.news/situations/monviso-environmental-instability-and-landslide