Humble topographic map

Much of the city was built on forested land, marshes, or swamps, and all are 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…

Average elevation: 25 m

Average elevation: 35 m

Settlement began in the Tomball area in the early 19th century, where settlers found an open, fertile land that received adequate rainfall—perfect conditions for farming and raising cattle. It was on a land granted in 1838 to William Hurd's heirs. In 1906 the area began to boom. Railroad line engineers often…

Average elevation: 52 m

Average elevation: 25 m

Average elevation: 19 m

Average elevation: 24 m

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Average elevation: 11 m

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Average elevation: 25 m

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Average elevation: 65 m

Average elevation: 19 m

Average elevation: 7 m

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Average elevation: 20 m

Average elevation: 56 m

Average elevation: 22 m

Average elevation: 15 m

Average elevation: 24 m

Average elevation: 46 m

Average elevation: 26 m

Average elevation: 15 m

Average elevation: 46 m

Average elevation: 20 m

Average elevation: 3 m

Average elevation: 11 m

Average elevation: 27 m

Average elevation: 10 m

Average elevation: 35 m

Average elevation: 4 m

Average elevation: 28 m

Average elevation: 22 m

Average elevation: 3 m

Average elevation: 43 m

Average elevation: 7 m