Extreme weather events have hit parts of Africa relentlessly in the last three years, with tropical storms, floods and drought causing crises of hunger and displacement. They leave another deadly threat behind them: some of the continent's worst outbreaks of cholera.

The war in Ukraine helped push the global total of people left internally displaced by conflict or natural disasters to a record high of 71.1 million last year, according to a report released on Thursday by the Norwegian Refugee Council’s Internal Displacement Monitoring Centre.