MIAMI—With so many multifamily industry watchers talking about a potential rental glut, a new report is defying those opinions. In fact, the report suggests we may be facing the opposite dilemma.

Published by the National Multifamily Housing Council, the report ranks Miami number four out of 50 metro areas in terms of hardest hit cities to add new apartment units. According to the findings, demand for rentals will more than double the available supply by 2030—a result of rising Millennial populations, increased urbanization and appetite for rental living.

A large majority of this activity is happening in Downtown Miami, where its population has more than doubled since 2000, with nearly 90,000 residents living in the urban core. The population is comprised overwhelmingly of young professionals, with more than half of its residents falling between the ages of 20-44, according to the Miami Downtown Development Authority.