00:00The French Alps recorded around 450 rockfalls in the Mont Blanc massive alone since the beginning of the year, setting
00:08an alarming record for the region in what has long been considered the safest time of the year for mountaineering.
00:15This is unprecedented according to researchers and scientists.
00:32The previous record was set in 2022 with 300 rockfalls recorded that year.
00:40We have about 200 years of climate warming covered by these photographs.
00:46We compare them to the other, we can identify the cicatrices, which is the zone of stabilization of the rockfalls.
00:54We can quantify them in terms of volume, and we have shown that 80% or 85% of these
01:01cicatrices were placed in place in the last two or three decades.
01:04So we have a very clear relation between the warming of the climate and the destabilization of the rockfalls.
01:11Analysts say frequent and prolonged heat waves are also weakening the mountains at a deeper level.
01:17The rockfalls, the avalanches rocheuses, are produced today due to the degradation of the permafrost, but also due to the
01:24release of the glaciers,
01:24because the glaciers tend to exert pressure on the versants, which are rather stabilisatrices.
01:29And when the glaciers lose in thickness, the rocks are descomprimed.
01:33In July, two Czech tourists lost their lives in a rock slide on Mont Blanc, and in August, a man
01:39also died under similar circumstances.
01:42Experts and local authorities are asking hikers to remain vigilant, as there may still be numerous rockfalls in the coming
01:50months.
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