Brienz/Brinzauls is first mentioned around 840 as
Brienzola. At that time, the population of the village was less than 100 residents. The entire village sits upon a layer of saturated soft-rock permeated by
glacial melt from the mountains above. The growth of and consequential increase in pressure on the water deposit below has led the 150-metre thick layer above to slide southwards at a rate of roughly 1.5 metres annually. Simon Löw, emeritus professor of Engineering Geology at
ETH Zurich, disputed a link to climate change, citing the lack of thawing permafrost and any correlation between annual rainfall and the speed at which the slope slides. Two roads and the railway line were also closed. There was, as predicted, a massive rockfall on the night of 15–16 June 2023 which stopped just before the village, with no damage reported to the buildings. Municipal officials ended the evacuation of the village on 3 July, while emphasizing that future evacuations could remain necessary.
2024 evacuation In 2024, the movement of an additional 1.2 million cubic metres of rock was detected. It was thought that the relatively slow movement of the rock mass could give villagers additional time, in the range of several months, but a sudden collapse, like that of 2023, was not ruled out; such an event would give no time for the inhabitants of the village to flee. Efforts were made in 2024 to reduce pressure on the deposit prior to its eventual collapse. Civil engineers sought to drain the meltwater deposit by tunneling underneath both layers and the mountain above. A new evacuation for the village’s 91 residents, as well as their pets and livestock, was ordered to be carried out by November 17th at the latest. Personal belongings and the
retable of the village's 500 year old church were transported out of the village as well. Since then, access to the village and its immediate environs has been prohibited, and it has been classified as a "
red zone" by cantonal authorities. Although the 2023 evacuation lasted only 51 days, this one is expected to last far longer, and may possibly be permanent. Even if, in the future, the village is deemed safe for public access, funds will be available for those who do not feel comfortable in their return. ==Geography==