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The Homestead Act of 1862, which provided settlers with 160 acres of public land, was followed by the Kinkaid Act of 1904 and the Enlarged Homestead Act of 1909. These acts led to a massive influx of new and inexperienced farmers across the Great Plains.
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Rising wheat prices in the 1910s and 1920s and increased demand for wheat from Europe during World War I encouraged farmers to plow up millions of acres of native grassland to plant wheat, corn, and other row crops. But as the United States entered the Great Depression, wheat prices plummeted. Farmers tore up even more grassland in an attempt to harvest a bumper crop and break even.
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The Dust Bowl, also known as “the Dirty Thirties,” started in 1930 and lasted for about a decade, but its long-term economic impacts on the region lingered much longer. Severe drought hit the Midwest and Southern Great Plains in 1930.
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Crops began to fail with the onset of drought in 1931, exposing the bare, over-plowed farmland. Without deep-rooted prairie grasses to hold the soil in place, it began to blow away. Eroding soil led to massive dust storms and economic devastation—especially in the Southern Plains.
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By 1934, an estimated 35 million acres of formerly cultivated land had been rendered useless for farming, while another 125 million acres—an area roughly three-quarters the size of Texas—was rapidly losing its topsoil.
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On May 11, 1934, a massive dust storm two miles high traveled 2,000 miles to the East Coast, blotting out monuments such as the Statue of Liberty and the U.S. Capitol.
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The worst dust storm occurred on April 14, 1935. News reports called the event Black Sunday. A wall of blowing sand and dust started in the Oklahoma Panhandle and spread east. As many as three million tons of topsoil are estimated to have blown off the Great Plains during Black Sunday.
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Oklahoma alone lost 440,000 people to migration. Many of them, poverty-stricken, traveled west looking for work. From 1935 to 1940, roughly 250,000 Oklahoma migrants moved to California. A third settled in the state’s agriculturally rich San Joaquin Valley.
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John Steinbeck memorialized the plight of the Okies in his 1939 novel The Grapes of Wrath. Photographer Dorothea Lange documented rural poverty with a series of photographs for FDR’s Farm Securities Administration. Artist Alexander Hogue painted Dust Bowl landscapes.
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Regular rainfall returned to the region by the end of 1939, bringing the Dust Bowl years to a close. The economic effects, however, persisted. Population declines in the worst-hit counties—where the agricultural value of the land failed to recover—continued well into the 1950s.