I'm listing some organizations if you care to help or need help.
- Coalition for the Homeless
http://www.coalitionforthehomeless.org/- NYC Department of Homeless Services
http://www.nyc.gov/html/dhs/html/home/home.shtml- New York Homeless Shelters
http://www.homelessshelterdirectory.org/newyork.html
What I just wrote above is absolutely nothing unless you've lived through this. Do something. At least, support whatever outreach ministry your church offers. Said the latter, if your church doesn't have outreach programs, find another church.