As the number of homeless people in New York City continues to rise, the Coalition for the Homeless, the city’s principal advocacy group, is blaming Mayor Bill de Blasio’s policies for making the crisis worse.

In January, according to the Coalition's report released Tuesday, 63,839 New Yorkers were sleeping in homeless shelters each night— approximately 700 more than a year earlier and the highest number since the city began keeping track. The Coalition said the de Blasio administration has failed to build enough affordable housing for homeless families and that the number of people living in city shelters is set to increase by 5,000 within three years.

“The problem is getting worse,” said David Giffen, the Coalition’s executive director. “Every year more New Yorkers are falling into homelessness.

Jane Meyer, a spokeswoman for Mayor de Blasio, said they have an “aggressive affordable housing plan,” with 10,000 apartments set aside for the homeless.