2020–2023 La Niña event

The 2020–2023 La Niña event was a rare three-year, triple-dip La Niña.[1] The impact of the event led to numerous natural disasters that were either sparked or fueled by the La Niña.

It led to record-setting tropical cyclone activity in the North Atlantic Ocean during the 2020 and 2021 hurricane seasons, with the 2020 season being the most active on record, and the 2021 season being the third-most active.[2][3] Numerous different catastrophic tropical cyclones, most notably hurricanes Laura, Eta, Iota, Ida, Fiona and Ian, made landfall during the event, leading to hundreds of billions of dollars in property damage to go alongside hundreds of deaths. It led to Australia (especially New South Wales) experiencing one of its wettest Marches on record following torrential rainfall in March of 2021 during the 2021 eastern Australia floods, which resulted in over A$1 billion (about $670 million USD) in damage from destroyed homes and roads. It also led to the March 2022 Suriname floods, which occurred in eastern Suriname during March of 2022. In New Zealand, North Island experienced one of its wettest summers on record following the catastrophic events of the 2023 North Island floods, which resulted in roughly NZ$1.3 billion (about $800 million USD) in damage. This came two years following the severe 2021 central New Zealand floods, which were also fueled by the La Niña.