How Houston Moved 25,000 People From the Streets Into Homes of Their Own

One steamy morning last July, Ana Rausch commandeered a shady corner of a parking lot on the northwest side of Houston. Downing a jumbo iced coffee, she issued brisk orders to a dozen outreach workers toting iPads. Her attention was fixed on a highway underpass nearby, where a handful of people were living in tents and cardboard lean-tos. As a vice president of Houston’s Coalition for the Homeless, Ms. Rausch was there to move them out.

I had come to watch the process and, more broadly, to see Houston’s approach to...