NEW YORK — Rising seas, spreading deserts, intensifying weather and other harbingers of climate change are threatening cultural landmarks from Canada to Antarctica, the World Monuments Fund said Wednesday releasing its latest list of the world's most endangered sites.

The fund's "100 Most Endangered Sites" list, issued every two years, is intended as a cultural clarion call, and the organization suggests it has been a successful one.

New Orleans is among at least six historic places with futures clouded by a changing climate, it said.

On Herschel Island, Canada, melting permafrost threatens ancient Inuit sites and a historic whaling town. In Chinguetti, Mauritania, the desert is encroaching on an ancient mosque. In Antarctica, a hut once used by British explorer Captain Robert Falcon Scott has survived almost a century of freezing conditions but is now in danger of being engulfed by increasingly heavy snows.