As Texas cities deal with the devastating human toll that Hurricane Harvey is leaving in its wake, the state's energy markets begin to take stock of possible damage at refineries and of disrupted production. In the Gulf of Mexico, approximately 21 percent -- 378,633 barrels per day -- of the 1.75 million barrels of oil produced each day is offline. Similarly, Harvey cut natural gas production by about 25.71 percent -- 827.89 million metric standard cubic meters per day (MMSCFD). In south Texas, the Eagle Ford Rock Formation (rich in shale oil and shale gas) halted an estimated 300,000 to 500,000 bpd of production, according to the Texas Railroad Commission. Many of the energy-related ports and terminals are closed, causing a delay of about 14 crude oil tankers in the Gulf. ...