As many as 150 million people in the world’s major cities could be reliant on flood defenses by 2070 – more than three times the 40 million people today – as a result of climate change and urban development, according to a major new study by the Organisation for Economic Co-operation and Development) and jointly authored by Risk Management Solutions (RMS) and leading academics from the University of Southampton, the Tyndall Centre, Météo-France, and the Centre International de Recherche sur l’Environnement et le Développement (CIRED).