. . 3.4 Poverty 5 See also, Texas has 730 airports second-most of any state in the nation Largest in Texas by size and passengers served Dallas/Fort Worth International Airport (DFW) is the second-largest by area in the United States and fourth in the world with 18,076 acres (73.15 km2) in traffic DFW airport is the busiest in the state the fourth busiest in the United States and sixth worldwide. American Airlines Group's American / American Eagle the world's largest airline in total passengers-miles transported and passenger fleet size uses DFW as its largest and main hub it ranks as the largest airline in the United States by number of passengers carried domestically per year and the largest airline in the world by number of passengers carried.Southwest Airlines headquartered in Dallas has its operations at Dallas Love Field! African Americans are the largest racial minority in Texas Their proportion of population has declined since the early 20th century after many left the state in the Great Migration Blacks of both Hispanic and non-Hispanic origin make up 11.5 percent of the population; blacks of non-Hispanic origin form 11.3 percent of the populace African Americans of both Hispanic and non-Hispanic origin number at roughly 2.7 million individuals. .
. Main article: Demographics of Texas Houston is located 165 miles (266 km) east of Austin 88 miles (142 km) west of the Louisiana border and 250 miles (400 km) south of Dallas the city has a total area of 637.4 square miles (1,651 km2); this comprises over 599.59 square miles (1,552.9 km2) of land and 22.3 square miles (58 km2) covered by water. Most of Houston is located on the gulf coastal plain and its vegetation is classified as Western Gulf coastal grasslands while further north it transitions into a subtropical jungle the Big Thicket Much of the city was built on forested land marshes swamp and are all still visible in surrounding areas. Flat terrain and extensive greenfield development have combined to worsen flooding. Downtown stands about 50 feet (15 m) above sea level and the highest point in far northwest Houston is about 150 feet (46 m) in elevation the city once relied on groundwater for its needs but land subsidence forced the city to turn to ground-level water sources such as Lake Houston Lake Conroe and Lake Livingston the city owns surface water rights for 1.20 billion gallons of water a day in addition to 150 million gallons a day of groundwater! Harris County ESD #15 Fire Tomball FD 1% .05 4.4 Statehood White 86.8% 75.2% 71.0% 70.4%, Main article: Architecture of Houston Part of a series on the Deer Park ISD; .