Volunteer in your area
While I think it is worthy for people to want to help in NYC, right now that's not feasible for many reasons. What is feasible is assisting local charities/blood banks RIGHT NOW. Even if you can't give money or blood, you CAN give your time and talents.
I strongly encourage my fellow members of the tech community to assist local organizations with updating their webpages, setting up online sign-ups for blood donations, answering emails, fixing computer equipment or even data entry and phone answering.
Use any of the links listed off of this site or ones you can find to track down local agencies in need of technical support and expertise.