Municipal Credit Union in the city, Bethpage FCU on Long Island among those hunkering down.
Connecticut, Massachusetts leagues shut offices, credit unions reported doing the same.
The 15 branches of Affinity Federal Credit Union remained closed Wednesday and its online banking service also was not available.
Leagues in New York, Rhode Island and North Carolina were among the organizations warning credit unions to batten down for the coming storm.
Credit unions from the Mid-Atlantic north should be prepared for Hurricane Sandy, according to the NCUA.
CUNA Mutual Group activates disaster team as late season hurricane makes menacing move toward Mid-Atlantic, Northeast states.
Louisiana insurers say claims are rolling in, but not a flood.
A dozen 12 credit unions in Louisiana sustain minor damage. Two credit unions may still be closed because of power outages.
Reports of loss stemming from Hurricane Isaac continue to be on the low end thus far, CUNA Mutual Group said Tuesday.
Storm's flooding causes $75,000 to $100,000 in damage at headquarters of Moss Point, Miss., credit union.