Heat dome to bring parts of Texas first 100-degree day of the year

Heat dome to bring parts of Texas first 100-degree day of the year
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<p>A heat dome that is building across the southern U.S. this weekend will push temperatures into the triple digits for much of Texas.</p><p>A heat dome is a sprawling area of slow-moving or stationary high pressure in the upper atmosphere that traps hot air and blocks cooling fronts.</p><p>In th...