The Chairman warned that communications outages could get worse before they get better, particularly for mobile, as flooding and snow in some areas could slow efforts.
FCC officials said that approximately 25 percent of wireless towers were out of service in a "core" region in 10 states from Virginia to Massachusetts. Many homes and businesses have lost cable television and Internet services as well.
Genachowski said that some wireless cells had switched to backup electric power after outages, but that "many sites were running out of backup power."
The major wireless carriers including Verizon, AT&T, Spring and T-Mobile said they had outages and were working to restore service. Sandy had also knocked out data centers in the New York City area, knocking some popular sites offline.