The World Meteorological Organization has retired four names after the 2017 season. Because of the destruction they left in their path, Harvey, Irma, Maria, and Nate will never again be used in the Atlantic Basin.

Harold, Idalia, Margot, and Nigel will respectively replace them starting in the 2023 Hurricane Season.

The 2017 Atlantic season is by far the costliest hurricane season on record with estimated damages of over $228 billion, over $100 billion more than the previous record holder: 2005.

Harvey became a category 4 hurricane on the Saffir-Simpson scale before making landfall along the middle Texas coast on Aug. 25. The storm then stalled, with its center remaining over or near the Texas coast for four days, dropping historic rainfall amounts, of up to five feet, causing catastrophic flooding in parts of southeastern Texas. Harvey is the second costliest hurricane in U.S. history (after inflation), behind only Katrina in 2005. At least 68 people died from the direct effects of the storm in Texas, the largest number in that state since 1919.

Irma was a long-lived hurricane that reached category 5 intensity on Sept. 5. The catastrophic hurricane made seven landfalls, four of which occurred as a category 5 hurricane across the northern Caribbean Islands. Irma made landfall as a category 4 hurricane in the Florida Keys on Sept. 10 and struck southwestern Florida as a category 3 the same day. Irma caused 44 direct deaths as a result of its strong winds, heavy rain and high surf. In the U.S., seven direct deaths were reported, and an additional 85 indirect deaths occurred, 80 of which were in Florida. Hundreds more were injured preparing for the storm, during it or in its aftermath.

Maria ravaged the island of Dominica as a category 5 on Sept. 19, and later devastated Puerto Rico as a high-end category 4 hurricane. It also inflicted serious damage on some of the other islands of the northeastern Caribbean Sea. Maria is the third costliest hurricane in U.S. history, behind Harvey and Katrina. Maria caused 31 direct deaths with 34 missing in Dominica, and two direct deaths in Guadeloupe. In Puerto Rico, the death toll stands at 65, which includes an unknown number of indirect deaths.

And finally, Nate crossed northeastern Nicaragua and eastern Honduras as a tropical storm, then made landfall on the northern Gulf Coast as a category 1 hurricane. It brought rainfall that caused significant impacts in Central America, where media reports indicate that these caused 44 deaths in the region. An additional fatality in Panama was due to a “shipwreck,” bringing the death toll directly associated with Nate to 45. An additional nine people were missing in the region. Nate eventually raced north into the Gulf of Mexico and made landfall in Louisiana at the Mouth of the Mississippi River and again along coastal Mississippi.