Deadly floods in Pakistan. Scorching heat and wildfires in the US West. Torrential rains in Australia and Indonesia. A megadrought in Brazil and Argentina. As climate change pushes weather disasters to new extremes, it’s La Nina, an atmospheric phenomenon, that has been the driver behind the chaos since mid-2020. And now the planet stands on the cusp of something that’s only happened twice since 1950 – three years of La Nina. Another year of La Nina means the world is hurtling toward $1 trillion in weather-disaster damages by the time 2023 wraps up.