With housing prices continuing to climb in many larger cities across the U.S., having a full-time job no longer guarantees that workers can afford to live in the city where they’re employed.

According to the National Low Income Housing Coalition, renters need to earn a wage of at least $21.21 per hour to afford a modest, two-bedroom rental home in the U.S. With a federal minimum wage of $7.25 per hour and an average hourly wage of $16.38 for renters nationwide, housing is simply unaffordable for many lower-income workers.

The working homeless population in tech hubs like Seattle and San Francisco has made headlines recently, and Axios says the problem is spreading even further across the states to cities including Dallas, New York and Washington, D.C.

These thousands of homeless workers return to their cars, RVs, homeless shelters, side streets or parking lots—often with their entire family—when their workday is done. Often called an invisible problem due to the lack of data on this growing population, working homelessness presents a host of problems, from basic questions like where to shower, sleep and eat safely to issues like not having a permanent address.

Axios consulted agencies, shelters and experts to get a better idea of how prevalent working homelessness actually is. Josh Leopold, a researcher at the Urban Institute, estimated that about 25 percent of the homeless population is employed, while Megan Hustings, director of the National Coalition for the Homeless, told Axios that between 40 and 60 percent of the homeless population floats in and out of full-time and part-time work.

In Washington, D.C., a 2017 report by the Washington Council of Governments says that 22 percent of homeless single adults and 25 percent of adults in homeless families are employed. Arianna Fishman of New York’s Department of Homeless Services told Axios that around 70 percent of the city’s 60,000 people living in homeless shelters are families—and 34 percent of those families include a working adult.

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