This report provides a basic summary of the observed and projected changes to Hawai‘i’s ecosystems and their resulting impacts for the state’s residents. The report focuses on five (5) systems: (1) marine ecosystems – (a) open ocean and (b) coral reefs and other nearshore habitats; (2) coasts and the built environment; (3) terrestrial ecosystems; (4) freshwater resources; and, (5) human health.