Galveston Island in the context of "Interstate 45"

Galveston Bay (/ˈɡælvɪstən/ GAL-vis-tən) is a bay in the western Gulf of Mexico along the upper coast of Texas. It is the seventh-largest estuary in the United States, and the largest of seven major estuaries along the Texas Gulf Coast. It is connected to the Gulf of Mexico and is surrounded by subtropical marshes and prairies on the mainland. The water in the bay is a complex mixture of seawater and freshwater, which supports a wide variety of marine life. With a maximum depth of about 10 feet (3 m) and an average depth of only 6 feet (2 m), it is unusually shallow for its size.

The bay has played a significant role in the history of Texas. Galveston Island is home to the city of Galveston, the earliest major settlement in southeast Texas and the state's largest city toward the end of the nineteenth century. While a devastating hurricane in 1900 hastened Galveston's decline, the subsequent rise of Houston as a major trade center, facilitated by the dredging of the Houston Ship Channel across the western half of the bay, ensured the bay's continued economic importance.

Galveston (/ˈɡælvɪstən/ GAL-vis-tən) is a resort city and port on the Gulf Coast of the U.S. state of Texas. It encompasses 211.31 square miles (547.3 km) on Galveston Island and Pelican Island. As of the 2020 census, the city had a population of 53,695, making it the second-largest municipality in Galveston County, where it also serves as the county seat. Located at the southern end of the Houston metropolitan area, Galveston sits on the northwestern coast of the Gulf of Mexico.

Galveston, or Galvez's town, was named after 18th-century Spanish military and political leader Bernardo de Gálvez, 1st Count of Gálvez (1746–1786). The first European settlements on Galveston Island were built around 1816 by French pirate Louis-Michel Aury to help the fledgling First Mexican Empire fight for independence from the Spanish Empire. The Port of Galveston was established in 1825 by the Congress of Mexico following its independence. The city was the main port for the fledgling Texas Navy during the Texas Revolution of 1836, and later served temporarily as the new national capital of the Republic of Texas. In 1865, General Gordon Granger arrived at Ashton Villa and announced to some of the last enslaved African Americans that slavery was no longer legal. This event is commemorated annually on June 19, the federal holiday of Juneteenth.

The 1900 Galveston hurricane, also known as the Great Galveston hurricane and the Galveston Flood, and known regionally as the Great Storm of 1900 or the 1900 Storm, was a catastrophic tropical cyclone that became the deadliest natural disaster in the history of the United States. The strongest storm of the 1900 Atlantic hurricane season, it left between 6,000 and 12,000 fatalities in the United States; the number most cited in official reports is 8,000. Most of these deaths occurred in and near Galveston, Texas, after the storm surge inundated the coastline and the island city with 8 to 12 ft (2.4 to 3.7 m) of water. As of 2025, it remains the fourth deadliest Atlantic hurricane on record, behind Hurricane Fifi of 1974. In addition to the number killed, the storm destroyed about 7,000 buildings of all uses in Galveston, which included 3,636 demolished homes; every dwelling in the city suffered some degree of damage. The hurricane left approximately 10,000 people in the city homeless, out of a total population of fewer than 38,000. The disaster ended the Golden Era of Galveston. The hurricane alarmed potential investors, who turned to Houston instead. In response to the storm, three engineers designed and oversaw plans to raise the Gulf of Mexico shoreline of Galveston Island by 17 ft (5.2 m) and erect a 10 mi (16 km) seawall.

On August 27, 1900, a ship east of the Windward Islands detected a tropical cyclone, the first observed that year. The system proceeded to move steadily west-northwestward and entered the northeastern Caribbean on August 30. It made landfall in the Dominican Republic as a weak tropical storm on September 2. It weakened slightly while crossing Hispaniola, before re-emerging into the Caribbean Sea later that day. On September 3, the cyclone struck modern-day Santiago de Cuba Province and then slowly drifted along the southern coast of Cuba. Upon reaching the Gulf of Mexico on September 6, the storm strengthened into a hurricane. Significant intensification followed and the system peaked as a Category 4 hurricane with maximum sustained winds of 145 mph (235 km/h) on September 8. Early on the next day, it made landfall to the south of Houston. The cyclone weakened quickly after moving inland and fell to tropical storm intensity late on September 9. The storm turned east-northeastward and became extratropical over Iowa on September 11. The extratropical system strengthened while accelerating across the Midwestern United States, New England, and Eastern Canada before reaching the Gulf of Saint Lawrence on September 13. After striking Newfoundland later that day, the extratropical storm entered the far North Atlantic Ocean and weakened, with the remnants last observed near Iceland on September 15.

The Texas barrier islands are a chain of barrier islands in the Gulf of Mexico along the Texas Gulf Coast. The islands enclose a series of estuaries along the Texas coast and attract tourists for activities such as recreational fishing and dolphin watching. The seven barrier islands, listed from northeast to southwest, are Galveston Island, Follet's Island, Matagorda Island, San José Island, Mustang Island, Padre Island, and Brazos Island.

Padre Island is the world's largest barrier island, with a length of 113 miles (182 km). Since 1962 Padre Island has been divided in two by the dredging of the Port Mansfield Channel roughly 30 miles (48 km) north of the south end of the island, which separated it into portions referred to as South Padre Island and North Padre Island.

Pelican Island is an island located in Galveston County, Texas. It is part of the city of Galveston and is linked to Galveston Island by the Pelican Island causeway. The island is home to the Texas A&M University at Galveston as well as two museum ships—the destroyer escort USS Stewart (DE-238) and the submarine USS Cavalla (SS-244)—and Seawolf Park. Seawolf Parkway is the only street that runs across the island. The Intracoastal Waterway borders it to the north, separating Pelican Island from another island.

The south side of the island is home to multiple facilities, such as dry docks, and tugboat operators, that support the maritime industry in Galveston, and the Galveston Texas City Pilots who navigate ships through Galveston Bay.

Galveston County (/ˈɡælvɪstən/ GAL-vis-tən) is a county in the U.S. state of Texas, located along the Gulf Coast adjacent to Galveston Bay. As of the 2020 census, its population was 350,682. The county was founded in 1838. The county seat is the City of Galveston, founded the following year, and located on Galveston Island. The most-populous municipality in the county is League City, a suburb of Houston at the northern end of the county, which surpassed Galveston in population during the early 2000s.

Galveston County is part of the nine-county Houston–The Woodlands–Sugar Land (Greater Houston) metropolitan statistical area.

The history of Galveston, Texas, begins with the archaeological record of Native Americans who used the island. The first European settlements on the island were constructed by the Spanish from New Spain around 1816. The Port of Galveston was established in 1825 by the Congress of Mexico following its successful revolution from Spain. The city served as the main port for the Texas Navy during the Texas Revolution. Galveston was founded in 1836 by Michel Menard, Samuel May Williams, and Thomas F. McKinney, and briefly served as the capital of the Republic of Texas. The Battle of Galveston was fought in Galveston Bay during the American Civil War when Confederate forces under Major General John B. Magruder attacked and expelled occupying Union troops from the city.

During the mid-19th century, Galveston emerged as an international city with immigration and trade from around the U.S. and the world. The city became one of the nation's busiest ports and the world's leading port for cotton exports. During that era, Galveston became Texas' largest city and was its prime commercial center. In 1900, the island was struck by a devastating hurricane. Even post-Hurricane Katrina, this event holds the record as the United States' deadliest natural disaster.

The George and Cynthia Mitchell Memorial Causeway is a set of causeways in Galveston, Texas, United States. Two of the routes carry the southbound and northbound traffic of Interstate 45, while the original causeway is restricted to rail traffic. It is the main roadway access point to Galveston Island. The second access point is Bolivar Ferry.

The causeway carries traffic over Galveston Bay and the Gulf Intracoastal Waterway. The original causeway was built in 1912 and carried both rail and auto traffic. The auto traffic was transferred to new causeways built to the west in 1939, leaving the original bridge for rail traffic. The original route was listed on the National Register of Historic Places in 1976.