 With this death toll, Idai is the deadliest tropical cyclone recorded in the South-West Indian Ocean basin, and the second-deadliest tropical cyclone overall in the Southern Hemisphere, behind only Cyclone Flores in 1973.In addition, the total damages from the cyclone are expected to exceed US$2 billion (2019 USD), which would make Idai the costliest cyclone on record in the basin.On March 18, Severe Tropical Cyclone Savannah crossed over from the Australian region basin into the South-West Indian basin, shortly after reaching its peak intensity.