It’s normal for millennials to still live at home these days. But what if you’re a millennial who doesn’t have a home to go back to?

Growing up, Alkeisha Porter says, she didn’t like her mom’s husband, and her dad had a drug problem. So at 16, she moved out and became homeless according to npr.org.

“I was basically just house-hopping from friends to some family members. Hey, it was comfortable to me. It wasn’t cold. I wasn’t sleeping outside,” says Porter, now 23.

Young people — 18- to 24-year-olds — make up one of the fastest-growing homeless populations in the country. In many big cities, like New York, Los Angeles and San Francisco, where housing is at a premium, finding affordable housing is especially hard.

In San Francisco, one-bedroom apartment rents average $3,490 a month. There are about 1,600 homeless young adults in the city on any given night, and public housing is out of reach for many of them reported

Porter found an apartment for herself and her baby on San Francisco’s Ocean Avenue, in a building run by a nonprofit called Mercy. It provides subsidized affordable housing for low-income residents, including 25 apartments reserved for 18- to 24-year-olds, stated reporter from npr.org