of Key West, while Coast Guardsmen evacuated Alligator Reef Light, American Shoal Light, and Sombrero Key Light. Ships docked at Key West sailed out to sea to ride out the squalls. On the morning of September 7, a hurricane watch was issued from the entire coast of Louisiana eastward to Apalachicola, Florida. On September 8, a hurricane watch was issued along the southwest coast of the state from Vermilion Bay westward. It was later extended westward to include the entire coast of Texas, and eastward to Apalachicola, Florida. A portion of the hurricane watch from Aransas Pass, Texas to Grand Isle, Louisiana was upgraded to a hurricane warning at 1600 UTC on September 9. An estimated 500,000 people fled the coasts of Texas and Louisiana, making it the largest evacuation in the history of the United States, at the time. Further, at least half of those people were from Texas. In small towns along the coast of Texas, 90–100% of their populations evacuated, while 20% of people left the larger cities. Many in Galveston stayed due to protection from the Galveston Seawall. Impact Carla spawned 21 tornadoes, the largest hurricane-related tornado outbreak on record at the time. However, it was overwhelmingly surpassed by Hurricane Beulah in 1967, which spawned at least 120 tornadoes. Throughout its path, 43 fatalities and about $325.74 million in damage were attributed to Carla. Most of the impact occurred in Texas, where the storm made landfall as a large and strong Category 4 hurricane. United States Texas Abnormally high tides and storm surge was reported along the coast of Texas, reaching at least above mean sea level at many coastal areas between Sabine Pass and Port Aransas. The highest tide reported was at Port Lavaca, with large wave heights including in Matagorda, in Port Aransas, in Freeport, in Texas City, and in Galveston and Sabine. Because the storm was a Category 4 hurricane at landfall, Carla produced strong winds, especially near its path. The strongest sustained winds include in Matagorda, in Victoria, and . Additionally, the highest wind gust observations include in Port Lavaca, in Matagorda, and in Aransas Pass, Austwell, Edna, Port Aransas, and Victoria. Carla produced heavy rainfall in Texas, peaking at in Bay City. Other significant precipitation totals include at Scholes International Airport at Galveston, in Downtown Galveston, in Wharton, in Liberty, in Dickinson, in Flatonia, in Columbus, in Hallettsville, and in Smithville.