A killer storm swallowed Galveston, cut off escape routes and forced changes that reshaped how America prepares for hurricanes. The Galveston hurricane of 1900 became one of the deadliest disasters in U.S. history and forced changes both in the city itself and in the way storm warnings were handled. Galveston later built a seawall and raised large sections of the city, while the U.S. Washington placed Galveston under a storm warning on September 7. Galveston Raised the City and Built a SeawallEngineers began reshaping the island after the hurricane rather than simply rebuilding what had been lost.