Climate change helped make it US’s 3rd most expensive year on record

U.S. weather disasters are getting costlier as more people move into vulnerable areas and climate change raises the risks of extreme heat and rainfall, National Oceanic and Atmospheric Administration officials warned as they released their annual billion-dollar disasters report on Jan. 10, 2023.

Even with an average hurricane season, 2022 had the third-highest number of billion-dollar disasters in the U.S. since 1980.

In all, there were 18 disasters that each caused more than US$1 billion in damage in the U.S. The list included three hurricanes, two tornado outbreaks, a destructive fire season, several extreme storms and a drought that disrupted sectors across the economy.

Map showing disasters, including several severe storms

2022 had 18 disasters that exceeded $1 billion each in damage.

It was also the third-costliest year, with past years adjusted for inflation, due primarily to Hurricane Ian’s widespread damage in Florida. Together, the 2022 disasters topped $165 billion, with damage still being tallied from December’s winter storms.

Several scientists wrote about the year’s U.S. weather disasters and connections to climate change. Here are three essential reads from The Conversation’s archive:

1. Hurricane Ian

The most expensive U.S. weather disaster of 2022 was Hurricane Ian, which grew into a monster of a storm over the warm waters of the Gulf of Mexico in late September.

Ian hit the barriers islands off Fort Myers, Florida, with 150-mph winds, tying for the fifth-strongest wind speed at U.S. landfall on record. Its storm surge swept through coastal neighborhoods, where the population has boomed in recent years, and its rainfall caused flooding across a large swath of the state. Twenty inches of rain fell in Daytona Beach, triggering erosion, with devastating consequences.

At least 144 deaths were attributed to the storm in Florida alone, and the total damage neared $113 billion.

Houses on a road, now underwater, are torn apart, with water on both sides.

Hurricane Ian’s wind and storm surge tore up homes and roads on the Gulf Coast.
Win McNamee/Getty Images

Did global warming play a role?

In some ways, yes, but there are still a lot of unknowns when it comes to hurricanes, explained climate scientists Matthew Barlow of UMass-Lowell and Suzana Camargo of Columbia University.

For example, “it is clear that climate change increases the upper limit on hurricane strength and rain rate, and that it also raises the average sea level and therefore storm surge,” Barlow and Camargo wrote.

Less clear is global warming’s influence on hurricane frequency, though research points to an uptick in the strength of storms that do form. “We expect more of them to be major storms,” the scientists wrote. “Hurricane Ian and other recent storms, including the 2020 Atlantic season, provide a picture of what that can look like.”

Globally, 2022 was the fifth or sixth warmest year in over 140 years of record-keeping, according to data sets from NASA and NOAA….

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