Glacial collapse kills 900, signals climate
A catastrophic glacial collapse in Nepal and Tibet, directly caused by climate warming, killed over 900 people and left 4,400 missing.
More than 900 people are dead and over 4,400 are missing after a glacial collapse in Nepal and Tibet unleashed a deadly torrent of mud and rock. Climate scientist Michael Mann, writing for The Guardian, states the disaster was a direct structural failure of a mountain caused by human-induced planetary warming.
Chilling footage captured the moment a 40-mile-per-hour wall of debris overtook fleeing crowds. Mann describes it as liquid concrete that instantly buried families under feet of silt. He contends this event crystallizes the climate crisis because the link to warming is unassailable, unlike many extreme weather events where the connection is statistical.
The science of climate attribution
Typically, scientists connect climate change to extreme weather through attribution science. This involves running parallel climate model simulations. One simulation models a world without human influence, while another includes greenhouse gas increases. By comparing how often an event occurs in each, scientists can attribute its extremeness to climate change. Mann compares this to epidemiology, where smoking makes lung cancer 30 times more likely.
For the Himalayan flood, the cause was direct: warming-induced glacial collapse. A CNN headline cited by Mann summarized the new reality: living downstream from a glacier has become a deadly liability.
A summer of attributed extremes
The Himalayan disaster capped a season of global extremes linked to climate change. The summer began with an unprecedented March heat dome in the southwestern U.S., which scientists found would have been virtually impossible without human-caused warming.
Subsequent heatwaves in Europe proved deadly. A May heat dome in the eastern U.S. smashed records. In Europe, a series of four record-breaking heatwaves led to tens of thousands of deaths. The first of these killed more than 3,000 people in Paris and nearly 6,000 across France. Mann confirms the deadly heat was formally attributed to climate change.
Wildfires and compound disasters
Record heat and extreme dryness in western Europe fueled catastrophic wildfires, forcing hundreds of thousands to evacuate. These fires were also attributed to human-caused warming. Similarly, hot, dry conditions in Canada and the northern U.S. led to huge wildfires whose smoke choked the East Coast for weeks, creating hazardous air quality in cities like Philadelphia.
In mid-August, a historic derecho - a wide line of severe thunderstorms with hurricane-strength winds - struck the U.S. Midwest. Winds exceeded 100 miles per hour, causing devastating flooding and leaving nearly a million people without power. While attribution for such rare events is challenging, Mann notes emerging evidence that climate change is making them more frequent and damaging.
Mann argues the current U.S. administration's policies, which he says were written by polluters, are worsening the situation. He states that political leaders continue to favor fossil fuel dependence despite the urgent need to transition to clean energy. The collective disasters of the past summer, he concludes, are an unmistakable consequence of continued planetary warming.
