Source: Hulton Archive / Getty Images
21. Betsy (1965)
> U.S. landfall: Key Largo, Florida
> Adjusted cost: $13.1 billion
> Unadjusted cost: $1.4 billion
> Deaths: 81
Source: Public Domain / Wikimedia Commons
20. Allison (2001)
> U.S. landfall: Southwest of Galveston, near Freeport, Texas
> Adjusted cost: $14.0 billion
> Unadjusted cost: $8.5 billion
> Deaths: 55
24/7 Tempo
Source: keyslibraries / Flickr
19. Agnes (1972)
> U.S. landfall: Near Cape San Blas, Florida
> Adjusted cost: $14.7 billion
> Unadjusted cost: $2.1 billion
> Deaths: 128
Source: Public Domain / Wikimedia Commons
18. Frances (2004)
> U.S. landfall: Southern end of Hutchinson Island, Florida
> Adjusted cost: $15.1 billion
> Unadjusted cost: $9.8 billion
> Deaths: 49
Source: jonathansloane / Getty Images
17. Irene (2011)
> U.S. landfall: Near Cape Lookout, North Carolina
> Adjusted cost: $17.4 billion
> Unadjusted cost: $13.5 billion
> Deaths: 49
