SeaWorld Orlando is a theme park and marine zoological park, located in Orlando, Florida.
 It is owned and operated by SeaWorld Parks & Entertainment.
 When combined with its neighbor Discovery Cove and Aquatica, it forms SeaWorld Parks and Resorts Orlando, an entertainment complex consisting of the three parks and many neighboring hotels.
 In 2016, SeaWorld Orlando hosted an estimated 4,402,000 guests, ranking it the tenth most visited amusement park in the United States and twenty-fifth worldwide.
The Texas City Terminal Railway is an American terminal railroad that operates 32 mi of track at the Port of Texas City in Texas City, Texas.
 Established in 1921, the TCTR is jointly owned by the Union Pacific Railroad and BNSF Railway.
Howl-O-Scream is an annual special event that occurs at Busch Gardens Tampa Bay, Busch Gardens Williamsburg, and SeaWorld San Antonio.
 The parks remain operational during the day and transition to Howl-O-Scream at night.
 The event features haunted houses, "scare zones", and live entertainment.
 It is a seasonal event that occurs in the Fall of the year, tied to Halloween.
The Port of Texas City is a major deepwater port in Texas City, Texas at Galveston Bay, United States.
 Its location on the bay, which is used by the Port of Houston and the Port of Galveston, puts Texas City in the heart of one of the world's most important shipping hubs.
 s of 2008 the Port of Texas City was the 14th leading port in the United States by total tons of trade and as of 2007 it was the 87th leading port in the world, according to the American Association of Port Authorities.
SeaWorld San Antonio is a 250 acre marine mammal park, oceanarium, and animal theme park, located in the Westover Hills District of San Antonio, Texas.
 It is the largest of the three parks in the SeaWorld chain owned by SeaWorld Entertainment, and the world's largest marine-life theme park.
 It also has a water park called Aquatica on the separate end of it.
 It has many shows in the summer.
 The other SeaWorld parks are located in San Diego, California, Orlando, Florida, and one will soon be located in Abu Dhabi, UAE under separate ownership.
 It is a member of the Alliance of Marine Mammal Parks and Aquariums (AMMPA) and is accredited by the Association of Zoos and Aquariums (AZA).
Texas City High School (TCHS) is a public high school in Texas City, Texas in Greater Houston.
 It is one of two high schools in the Texas City Independent School District (TCISD).
The Texas City disaster was an industrial accident that occurred April 16, 1947, in the Port of Texas City.
 It was the deadliest industrial accident in U.S. history, and one of the largest non-nuclear explosions.
 Originating with a mid-morning fire on board the French-registered vessel SS "Grandcamp" (docked in the port), her cargo of approximately 2,200 tons (approximately 2,100 metric tons) of ammonium nitrate detonated, with the initial blast and subsequent chain-reaction of further fires and explosions in other ships and nearby oil-storage facilities.
 It killed at least 581 people, including all but one member of the Texas City fire department.
 The disaster triggered the first ever class action lawsuit against the United States government, under the then-recently enacted Federal Tort Claims Act (FTCA), on behalf of 8,485 victims.
The Texas City Refinery explosion occurred on March 23, 2005, when a hydrocarbon vapor cloud was ignited and violently exploded at the ISOM isomerization process unit at BP's Texas City refinery in Texas City, Texas, killing 15 workers, injuring more than 180 others and severely damaging the refinery.
 The Texas City Refinery was the second-largest oil refinery in the state, and the third-largest in the United States with an input capacity of 437000 oilbbl per day as of January 1, 2000.
 BP acquired the Texas county refinery as part of its merger with Amoco in 1999.
Sesame Street 4-D Movie Magic (titled Sesame Street Presents Lights Camera Imagination!
 4-D at SeaWorld and Busch Gardens Europe parks, and Sesame Street Film Festival 4-D at Busch Gardens Africa) is a 4D film theme park attraction located at Universal Studios Japan, SeaWorld San Antonio, formerly at SeaWorld San Diego, Busch Gardens Williamsburg and Busch Gardens Tampa Bay.
 The attraction, which was made to run at Universal Studios Japan, was later acquired by SeaWorld Parks and Entertainment to run at their Busch Gardens and SeaWorld theme parks.
 In addition, Busch Gardens parks also include multiple other Sesame Street themed attractions, as part of their Sesame Street Forest of Fun/Sesame Street Safari of Fun park areas.
 The attraction contains 4-D effects to go along with the film which include spraying water, bursts of air, leg ticklers and fans.
Texas City Independent School District is a public school district based in Texas City, Texas.
 It serves most of Texas City and La Marque as well as a portion of Tiki Island.

Question: Howl-O-Scream is an event that occurs at the largest SeaWorld theme park in which Texas city?
Answer: San Antonio