Hurricane Katrina, 2005: $108 billion

Hurricane Katrina is arguably the most notorious storm of the 21st century. The storm made landfall as a Category 5 near Miami before striking Louisiana as a Category 3 storm. Katrina was the third deadliest hurricane in US history, with more than 1,200 deaths. It caused $108 billion in damage, making it costliest hurricane the country has ever seen.