Thanks to my friend in NYC, David Pollock, for a link to this useful  document.  It was smart of Senator Gillibrand to get this information together in a timely way. See:

A Guide to Disaster Assistance and Relief Funding; How to Navigate the Disaster Assistance Process. (20 pp.)

The references to agencies and contacts are NY state and city specific, but the general federal information should be useful to many people in other states.