A new study examines an Alaska landslide last year and reports that it generated one of the largest tsunamis ever recorded. The research describes how millions of tonnes of rock fell about one kilometre into an Alaska fiord, producing a tsunami with an estimated wave height of 481 metres—higher than the CN Tower’s tallest viewing platform. The study also points to conditions that made the event possible, saying the tsunami may not have occurred without rapid retreat of a glacier that otherwise would have been in the landslide’s path. Taken together, the findings suggest that changes in glacier stability and coastal landscapes can affect tsunami generation in fjord-like settings. The same research is presented as a warning for British Columbia, where similar fjord and slope conditions could pose risks if glaciers retreat or destabilize further. The reporting emphasizes that the work is based on the study’s analysis of the event and its likely triggers, while the broader implications focus on how environmental changes could influence future tsunami hazards.