Houston is the fourth-largest city in the country. It’s home to the nation’s largest refining and petrochemical complex, where billions of gallons of oil and dangerous chemicals are stored. And it’s a sitting duck for the next big hurricane. Why isn’t Texas ready? ... Such a storm would devastate the Houston Ship Channel, shuttering one of the world’s busiest shipping lanes. Flanked by 10 major refineries — including the nation’s largest — and dozens of chemical manufacturing plants, the Ship Channel is a crucial transportation route for crude oil and other key products, such as plastics and pesticides. A shutdown could lead to a spike in gasoline prices and many consumer goods — everything from car tires to cell phone parts to prescription pills. ... After decades of inaction, they hoped that a plan to build a storm surge protection system could finally move forward. ... Several proposals have been discussed. One, dubbed the “Ike Dike,” calls for massive floodgates at the entrance to Galveston Bay to block storm surge from entering the region. That has since evolved into a more expansive concept called the “coastal spine.” Another proposal, called the “mid-bay” gate, would place a floodgate closer to Houston’s industrial complex. ... The 10 refineries that line the Ship Channel produce about 27 percent of the nation’s gasoline and about 60 percent of its aviation fuel ... Flooding is the most disruptive type of damage an industrial plant can experience from a hurricane. Salty ocean water swiftly corrodes critical metal and electrical components and contaminates nearby freshwater sources used for operations.