Swiss glaciers lost 5.5% of their ice volume in the first eight months of 2026, bringing total losses since 2021 to 19.4%. Researchers say some glaciers are now collapsing from within as meltwater carves out large cavities. The Guardian reports: Matthias Huss, a glaciologist at ETH Zurich and lead author of the report, said many people do not realize how fast glaciers are retreating, or that just one generation ago some now-barren sites used to sit beneath hundreds of meters of ice. The scientists have not yet compiled a formal tally of lost glaciers this year but said they had witnessed the death of a number of small ones. "I visited one last week and it's so impressive to stand in this moonlike landscape where there was a big layer of ice -- an extensive glacier -- just a few years ago," said Huss. "And now it's a rock desert where there's some scattered blocks of old ice still lying around and melting on the hot rocks." The report, a collaboration between the Swiss Glacier Monitoring Network and the Swiss Commission for Cryosphere Observation, found the mean thickness of individual glaciers fell by between 2.5 metres and 4 metres in 2026. Huss said scientists were increasingly seeing glaciers collapse from the inside -- the result of internal streams beneath the ice that excavate caverns -- rather than simply retreating from surface heat. [...] Analysis published by MeteoSwiss on Tuesday found the summer half-year from April to September was the hottest and driest it had been since records began in 1864. In that time, humanity has filled the atmosphere with 1.8tn tons of carbon dioxide and heated the planet by about 1.4C.

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fjo3 shares a report from The Guardian: Communities across California are rushing to prepare for the imminent arrival of the so-called "Kelvin wave," a massive underwater band of warm water threatening to inundate swaths of the vast North American shoreline. The wave is nearing southern California and expected to reach the San Francisco Bay Area by early October, as it crawls toward Alaska. Waters could rise by a foot along the California coast, according to scientists, who have warned that this could dramatically double the 8-12in rise in sea levels already caused by climate change over the last century. The Kelvin wave doesn't climb and crash like a typical ocean wave; rather, it swells the tides from beneath the surface. It's effectively a massive slosh of warm water, driven by El Nino conditions, that moves across the Pacific before colliding with the South American coastline and surging north. It also won't transport water in the way a tsunami might, but creates conditions that enable higher sea levels to linger. On their own, Kelvin waves aren't always hazardous, according to Mike Jacox, a research oceanographer with the National Marine Fisheries Service, though they can reduce the growth of phytoplankton that form the base of the marine food web. "But when there are very high tides or storm surges, their effects can be amplified," he said. If the rising waters coincide with other climatic events, such as rainstorms and high tides, the phenomenon could swallow beaches, chew away bluffs and coastlines, and submerge streets, homes and businesses. "This coming Kelvin wave is just the beginning," said Dr Jonathan Warrick, a research geologist at the US Geological Survey. "The thing to look out for is what will happen in January, February and March -- that's when we get the biggest storms, we get our largest waves and we have some very large tides." If these events align, their effects will compound, setting the stage for a tumultuous winter. Together, Warrick said, the systems will pack a far bigger punch. "When it comes to these storms and the tides," he said, "we really are kind of rolling the dice."

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