“This is in the best interest of Logan families, travelers and employees as the airport is not an appropriate place for people to seek shelter,” Rice said in a statement.

Families staying at Logan who are on the state's emergency shelter waiting list are being offered transfers to the state's social security system, including a site in Norfolk that opened this week and can house up to 140 families at full capacity.

The number of families leaving shelters has steadily increased in recent months. In May alone, more than 300 families left shelters – the highest number in years, Rice said. But there is still no room in shelters in Massachusetts, he said.

“If families travel to Massachusetts, they must have a shelter plan that does not include Logan Airport or our emergency shelters,” he said.

Homeless advocates have raised concerns about the airport ban. Given caps on the number of families who can access emergency shelters, Logan Airport has been an “inadequate but crucial lifeline” for hundreds of children and parents waiting for long-term housing this year, said Kelly Turley, deputy director of the Massachusetts Coalition for the Homeless.

Advocates called on the state to better address the root causes of the overall crisis related to affordable housing and homelessness in the state.

Earlier this week, Healey sent a team of officials led by Rice to the southern border. They met with organizations that help families at the border, including Catholic Charities and the Interfaith Welcome Coalition, to ensure they had “accurate, up-to-date information about the emergency shelter shortage in Massachusetts,” as the administration put it.

The government will continue to spread the message through leaflets in English, Spanish and Haitian Creole.

The flyers not only say that the state's shelters are full, but also that there are sobering facts about the state. The average rent for a two-bedroom apartment is between $2,800 and $3,500, and Massachusetts is “very cold in the winter and very hot in the summer.”

Also on Friday, the Supreme Court allowed cities to ban homeless people from sleeping outdoors in public places, ruling on ideological grounds that such laws do not constitute cruel or unusual punishment – even in West Coast regions where shelters are scarce.