The YMCA of Greater Boston started Monday offering day programming and warm spaces for migrant and homeless families staying at a temporary overnight shelter inside the Park Plaza Transportation Building, the organization announced Wednesday.

Staff from the Wang YMCA of Chinatown said they will provide food, programming, and a “warm and welcoming environment” for migrants during the daytime hours while temporary shelter is not available at the transportation building only blocks away.

Emergency Assistance Director Lt. Gen. Scott Rice said the handful of community rooms and gym at the YMCA playing host to families during the day is “an ideal place” for people during the winter.

Families are “integrated” into all the daily rhythm of the Wang YMCA, said YMCA of Greater Boston CEO David Shapiro, but are moved around throughout the building so as to not take away from members’ experience.

Shapiro said there is no formal contract between the state and the YMCA of Greater Boston to offer daytime services to families. The organization was already talking with state officials about offering overnight shelter when the idea of daytime services came up, he said.

“We’re just doing it. It’s the right thing to do for newcomers coming here,” he said.

Rice said the temporary sleeping space set up earlier this month for up to 25 families at the transportation building is expected to stay open until Dec.7 as officials look for more “overnight overflow facilities.”

Shapiro said day services are “connected” to shelter space at the transportation building because they are near each other.

“We’ve already begun talking about where else we might be able to coordinate or not. I mean, proximity is a big part of things here that works well. So we’ll keep it open as long as the state needs us to coordinate,” he said.

But families staying in the shelter space at the transportation building must travel to one of two intake centers — either in Quincy or Allston — to recertify themselves for another night’s stay on a cot in a Massachusetts-owned conference room.

The intake center in Quincy, located at Eastern Nazarene College, is a roughly hour commute from the Wang YMCA on public transit, assuming there are no delays, or a nearly three hour walk. The Allston intake center is nearly an hour bus commute or one and half hour walk.

The use of a state building came as emergency shelters across Massachusetts reached the Healey administration’s self-imposed capacity of 7,500 families, which triggered a waitlist that sat at 91 families as of Tuesday.

Rice said there are no plans to use another state building for shelter “but that’s not out of the question ever.”