With the 2017 Atlantic hurricane season finally over, scientists are taking stock of what they say was a monumental year.
A total of 10 hurricanes swept the region. Six were major storms of Category 3 or higher, and three of those were Category 4 or higher when they made landfall, spreading havoc from the Caribbean to Texas.
The Atlantic Ocean is vast and has always made its own weather. But a typical year sees about six hurricanes, not 10. And three strong hurricanes hitting land — Harvey, Irma and Maria — is extraordinary.
So what's going on?