Hannity was in Huron, CA. It may be about 35 miles from Selma, but VDH's point is that it's the western side of the valley which is being hurt by the cut-off. Huron is near I-5. Selma is on the eastern side of the valley on Hwy. 99.
VDH also makes it sound like a smaller number of acres are being left dry (his figure is half what Hannity was saying).