The gasoline supply chain has five main parts: producing or importing crude oil; importing gasoline; refining the crude oil into gasoline; blending gasoline with ethanol at distribution terminals; and selling the gasoline at retail stations. Between each part, various storage and distribution logistics steps are involved to move and store both crude oil and gasoline. Disruptions can affect any part of the supply chain, and during major disruptions such as hurricanes or power outages, the Department of Energy issues situation reports to provide information about a disruption's effect on gasoline supply and other energy infrastructure and supply issues.