Though much of Cobble Hill was fortunate to see its damage limited to trees and cars rather than people and families, many of our immediate neighborhoods and neighbors were not so lucky. Community Board 6 indicates several great ways to help locally...
In Park Slope there are 2 emergency shelters operating out of John Jay High School at 237 7th Avenue, and the Park Slope Armory at 361 15th Street. Periodic announcements indicate that at any given time they may be in need of either supplies or volunteers or both.
In Red Hook, the Red Hook Initiative has been coordinating relief and support efforts (and doing a phenomenal job!). Feel free to drop in at 767 Hicks Street or call them at (718) 858-6782.
Also, Give blood. Some of the City's blood supplies were contaminated from flood waters and need to be replaced. The best way to donate locally is to reach out to the NY Blood Center (800) 933-2566 and schedule an appointment at the nearby location in Downtown Brooklyn at 120 Lawrence Street.