The ocean on which Earth depends for relatively predictable weather, temperature and provisioning of goods and services is now changing more rapidly than it has for millions of years. This is due to human interactions with the  atmosphere and land, and increasing expansion of the footprint of human impacts across the ocean. It is increasingly evident that patterns and trends in ocean and atmospheric responses are falling outside documented historical  norms. The report explores the hazards and risks associated with ocean warming from a variety of angles, and by using graphics looks at how these ‘simple’ temperature-related changes to the ocean can ripple out into many aspects of society. It aims to stimulate further discussion by exploring and exposing the issues that arise.