Climate Change & Tropical Cyclones in the North Atlantic, Caribbean and Gulf of Mexico.The Chief Risk Officer (CRO) Forum’s Emerging Risk Initiative is committed to continuously improving risk management. This paper advocates as best practice a process whereby insurers and reinsurers re-examine their assumptions about frequency, severity, loss trends and how the risks in their portfolios are interconnected and generally stress test their internal processes for hitherto “unthinkable” dimensions of risks. The paper seeks to address rating agencies, analysts, governments, regulators, intermediaries and risk modelling firms alike. This study is non-binding and for reference purposes only.