Plumbers, casino supervisors, pizzeria managers, and factory workers—these aren't the people you'd expect to see homeless. They deliver groceries, sell eyeglasses, and unload trucks at Amazon, yet they can't afford a place to live. 

Homelessness is getting worse, especially among people with jobs. Even with decent-paying positions, they simply can't keep up with skyrocketing rents. Interviews with shelter workers and data on rising evictions reveal that more working Americans are be...