The phrase "climate calamity" refers to a severe and disastrous event or situation caused by the changing climate, such as extreme weather events, rising sea levels, or widespread environmental devastation. Full definition
CLIMATE CALAMITIES As ice shelves on the Southern Antarctic Peninsula weaken, glaciers flow faster into the sea. (sciencenews.org)
Presentations and speeches were followed by a wave of coverage, primarily in Europe, focused on what many papers said was strong new evidence of pending climate calamity. (dotearth.blogs.nytimes.com)