More than 90% of Italian municipalities are prone to landslides or other natural disasters, the head of the national civil protection agency said in a Monday interview.

"94% of municipalities are at risk of flooding, landslides, coastal erosion," Fabrizio Curcio told La Stampa newspaper, adding that "all of Italy is at risk."

Curcio spoke after a mudslide devastated the southern Italian holiday island of Ischia on Saturday, causing the death of at least seven people.

He said Ischia was at greater risk because many of its houses were built illegally, but stressed that other parts of Italy with fewer land planning violations were also vulnerable. (Reporting by Alvise Armellini, editing by Federico Maccioni)