Cyclone Idai

South-West Indian Ocean cyclone in 2019

  • northern and central Mozambique
  • Malawi
  • northern Madagascar
  • Zimbabwe
Intense Tropical Cyclone Idai
IBTrACSEdit this at Wikidata

Part of the 2018–19 South-West Indian Ocean cyclone season

Intense Tropical Cyclone Idai (/ɪˈd, ˈd/) was one of the worst tropical cyclones on record to affect Africa and the Southern Hemisphere.[4] The long-lived storm caused catastrophic damage, and a humanitarian crisis in Mozambique, Zimbabwe, and Malawi, leaving more than 1,500 people dead and many more missing. Idai is the deadliest tropical cyclone recorded in the South-West Indian Ocean basin. In the Southern Hemisphere, which includes the Australian, South Pacific, and South Atlantic basins, Idai ranks as the second-deadliest tropical cyclone on record. The only system with a higher death toll is the 1973 Flores cyclone that killed 1,650 off the coast of Indonesia.[5][6]

The tenth named storm, seventh tropical cyclone, and seventh intense tropical cyclone of the 2018–19 South-West Indian Ocean cyclone season, Idai originated from a tropical depression that formed off the east coast of Mozambique on 4 March 2019. The storm, Tropical Depression 11, made landfall in Mozambique later in the day and remained a tropical depression through its five-day trek over land. On 9 March, the depression re-emerged into the Mozambique Channel and strengthened into Moderate Tropical Storm Idai on the next day. Idai then began a stint of rapid intensification, reaching an initial peak intensity as an intense tropical cyclone, with sustained winds of 175 km/h (109 mph) on 11 March. Idai then began to weaken, due to ongoing structural changes within its inner core, falling to tropical cyclone intensity. Idai's intensity remained stagnant for about a day or so before it began to re-intensify. On 14 March, Idai reached its peak intensity, with maximum sustained winds of 195 km/h (121 mph) and a minimum central pressure of 940 hPa (27.76 inHg). Idai then began to weaken as it approached the coast of Mozambique, due to less favourable conditions, weakening below intense tropical cyclone status later that day. On 15 March, Idai made landfall near Beira, Mozambique, subsequently weakening into a remnant low on 16 March. Idai's remnants slowly continued inland for another day, before reversing course and turning eastward on 17 March. On 19 March, Idai's remnants re-emerged into the Mozambique Channel and eventually dissipated on 21 March.[7][8]

Idai brought strong winds and caused severe flooding in Madagascar, Mozambique, Malawi, and Zimbabwe, which killed at least 1,593 people[9] – and affected more than 3 million others.[10] Catastrophic damage occurred in and around Beira in central Mozambique. The President of Mozambique stated that more than 1,000 people may have died in the storm.[11] 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. In the former nation, rescuers were forced to let some people die in order to save others.[12] A cholera outbreak ensued in the storm's wake, with more than 4,000 confirmed cases and seven fatalities by 10 April. Total damages from Idai across Mozambique, Zimbabwe, Madagascar, and Malawi were estimated to be around $3.3 billion (2019 USD),[13][10] with US$1 billion alone in infrastructure damages, making Idai the costliest tropical cyclone in the South-West Indian Ocean basin.[14][15][16][17]

Meteorological history

Map plotting the storm's track and intensity, according to the Saffir–Simpson scale
  Tropical depression (≤38 mph, ≤62 km/h)
  Tropical storm (39–73 mph, 63–118 km/h)
  Category 1 (74–95 mph, 119–153 km/h)
  Category 2 (96–110 mph, 154–177 km/h)
  Category 3 (111–129 mph, 178–208 km/h)
  Category 4 (130–156 mph, 209–251 km/h)
  Category 5 (≥157 mph, ≥252 km/h)
  Unknown
Storm type
circle Tropical cyclone
square Subtropical cyclone
triangle Extratropical cyclone, remnant low, tropical disturbance, or monsoon depression