If you’re not sure where to donate, or whether an organization is legitimate, these sites may help:
http://www.charitynavigator.org/index.cfm/bay/content.view/catid/68/cpid/310.htm
http://www.guidestar.org/reports/partners/guidestar/hurricane.jsp
http://www.networkforgood.org/topics/animal_environ/hurricanes/?source=CN&cmpgn=\
CRS