Risk of significant tsunami within next 30 years is nearly 100%, Unesco says, as it urges coastal cities to become ‘tsunami-ready’

A tsunami could soon hit major cities on or near the Mediterranean Sea including Marseille, Alexandria and Istanbul, with a nearly 100% chance of a wave reaching more than a metre high in the next 30 years, according to Unesco.

The risk of a tsunami in Mediterranean coastal communities is predicted to soar as sea levels rise. While communities in the Pacific and Indian Ocean, where most tsunamis occur, were often aware of the dangers, it was underestimated in other coastal regions, including the Mediterranean, Unesco said.