The deluge capped a summer of extreme climate events, from deadly heatwaves to wildfires. We must take action now

For millennia, the high peaks of the Himalayas were held together by an invisible, frozen cement – permafrost and glacial ice that bound ancient rock into seemingly unshakable fortresses. But as the planet continues to warm, this alpine glue is liquefying.

The glacial collapse and deluge in Nepal and Tibet was not a freak weather event; it was the structural failure of a mountain itself, nature’s latest commentary on the deadly consequences of human-caused planetary warming. And it was the exclamation point on a summer of extremes, illustrating with a sole unnatural disaster the apocalyptic future that lies in store if we fail to take dramatic climate action.

As families await news of missing loved ones, the disaster is a stark reminder of how the climate crisis is creating a fast-growing threat. Plus, the town considered India’s ‘Jurassic Park’

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It has been hard not to despair while watching the ruinous floods swallow parts of Nepal, and harder, still knowing that the agony compounds each passing day for dozens of Indian families whose members remain unaccounted for.

Social media is awash with desperate pleas, photos and details of the young and old, men and women, from Mumbai to Kolkata, posted by families searching for traces of life. The disaster unfolded when a melting glacier slammed into the valley below, unleashing a deadly cascade of rock and ice down the Bhote Kashi River, which flows from Tibet into Nepal.

In Alaska, the Himalayas, the Andes, Greenland, and perhaps also the Alps, deadly chain reactions are just waiting to be triggered

You may not have felt it, but the earth beneath our feet is getting twitchier, and global heating is to blame. As temperatures surge and climate breakdown accelerates, interactions between climate and geology are becoming ever more apparent – as marked by last week’s horrific events in Nepal and Tibet. We still have a bit of a blind spot when it comes to the idea that a changing climate can impact what scientists call the geosphere, but the evidence has long been incontestable.

In 2021, a similar deluge ripped through a series of mountain valleys in the Indian Himalayan state of Uttarakhand, severely damaging two hydroelectric power plants and taking about 200 lives. In August 2025, a colossal landslide in an Alaskan fjord created a 500-metre-high wave in an area frequented by cruise ships. A few months earlier, the collapse of part of a glacier in Switzerland’s Valais canton caused a debris-laden torrent that destroyed and buried most of the already evacuated village of Blatten.

Bill McGuire is professor emeritus of geophysical and climate hazards at UCL. His latest book is The Fate of the World – a History and Future of the Climate Crisis

Flash flooding in Arizona tourist destination was likely triggered by compounding climate factors, such as drought and warming in Pacific Ocean

• Remote Grand Canyon lodge hit by deadly flash flood boasts fabled history

A deadly flash flood in the Grand Canyon over the weekend was likely driven by a confluence of climate factors, including drought, wildfire scarring and warming temperatures in the Pacific Ocean that can supercharge storms.

At least two people have died, nearly 80 people were rescued and one remained unaccounted for after a surge of water and debris swept through the immensely popular tourist destination on Saturday, fueled by torrents of rain that hit the national park’s Bright Angel Creek area.

Flash flooding in Arizona tourist destination was probably triggered by compounding climate factors, such as drought and warming in Pacific Ocean

• Remote Grand Canyon lodge hit by deadly flash flood boasts fabled history

A deadly flash flood in the Grand Canyon over the weekend was probably driven by a confluence of climate factors, including drought, wildfire scarring and warming temperatures in the Pacific Ocean that can supercharge storms.

At least two people have died, nearly 80 people were rescued and one remained unaccounted for after a surge of water and debris swept through the immensely popular tourist destination on Saturday, fueled by torrents of rain that hit the national park’s Bright Angel Creek area.

Phantom Ranch, set up by Teddy Roosevelt, has welcomed exhausted hikers to its famed cabins for over a century

• Two dead and nearly 80 rescued after Grand Canyon flash flood

Phantom Ranch has been a solitary refuge visited by some of the most famous names of history. More typically, it’s been a beacon for the half-collapsed, exhausted and overheated hikers trudging down the Grand Canyon for more than a century.

The sole lodge at the very bottom of the Grand Canyon, the cabins long had a near mythical reputation. Located along the Bright Angel Creek, which tumbles into the mighty Colorado River at the base of the canyon, they served as a reminder of the long history of one of America’s most spectacular but savage environments.