When we picture climate change it is often extreme weather that springs to mind: hurricanes, cyclones, droughts, heatwaves and floods. But secondary impacts, such as landslides, also present a major threat.
Just over two weeks ago, Cyclone Idai made landfall in Mozambique and high winds, rainfall and flooding were the primary concern. But for the people living in the Chimanimani district of Zimbabwe, it turned out to be earth itself that presented the biggest danger.
More than 180 people in the region are known to have been killed by the landslides triggered by Idai. “Rocks came from the mountain and crushed our hut …,” said a woman. One of her three children was killed in the crush.
Nasa satellite images clearly depict the extensive landslide activity associated with Cyclone Idai. Exacerbated by deforestation, the movement started in the upper reaches of river catchments, but quickly gathered material and pace.
“Sediment-rich floods in the main channel illustrate the way in which landslides high in the catchment can cause extensive damage long distances downstream,” explains Dave Petley in his landslide blog. We cannot stop cyclones, but we can prepare for landslides; just one way in which we can mitigate against climate change.
