Here, Tex Thornton, operating on the now debunked concussion theory, coaxed today's inflation-adjusted equivalent of $1 million from the locals on claims he could fire rocket-powered explosives into the clouds and cause rain.[11] The city has added a Lake Center at which guests can check-out various items such as bicycles, board games, fishing poles and tackle, golf discs, and more.[19] Dalhart experiences a semiarid climate (Köppen BSk) with cool, dry winters and hot summers.The average annual rainfall of less than 17 inches or 430 millimetres strongly influences both Dalhart's ecological climate and agricultural practices, especially center-pivot irrigation.In December 2015, the Seattle Post-Intelligencer voted Dalhart number eight of the 10 "most conservative" cities in the United States in regard to campaign contributions.In contrast, Vashon Island, Washington, was named the "most liberal" city in the nation regarding political donations.Later, center pivot irrigation, credited to Colorado farmer Frank Zybach in 1949,[30] was introduced and was found to be ideal for the area's rolling sandy soils.[citation needed] In the mid-2000s, a combination of tax incentives, Texas' relatively unrestricted environmental regulations, and Dalhart's existing agricultural infrastructure attracted industrial dairy farms to the area.[31] In 2007, Hilmar Cheese Company of California capitalized on the resulting milk availability, opening a major production plant in Dalhart.Students attend Dalhart High School, which competes athletically and scholastically in District 1 Division 3A of Texas' University Interscholastic League.