Tropical Cyclone Idai was one of the worst tropical cyclones on record to affect Africa and the Southern Hemisphere as a whole. The long-lived storm caused catastrophic damage in Mozambique, Zimbabwe, and Malawi, leaving more than 1,000 people dead and thousands more missing. Idai brought strong winds and caused severe flooding in Madagascar, Mozambique, Malawi, and Zimbabwe, which killed 1,074 people – 598 in Mozambique, 415 in Zimbabwe, 60 in Malawi, and one in Madagascar – and affected more than 3 million others. Catastrophic damage occurred in and around Beira in central Mozambique. A major humanitarian crisis unfolded in the wake of the cyclone, with hundreds of thousands of people in urgent need of assistance across Mozambique and Zimbabwe. A cholera outbreak ensued in the storm’s wake in Beira, with more than 500 confirmed cases and one fatality by 31 March. Infrastructural damages from Idai across Mozambique, Zimbabwe, Madagascar and Malawi were estimated to be at least US$1 billion (2019 USD), making Idai the costliest tropical cyclone in the South-West Indian Ocean basin.