breaking news on "world news now" -- hurricane isaac's powerful wind and heavy rain is hitting the gulf coast right now on the anniversary of katrina. >> hours after the storm barreled ashore in louisiana, hundreds of thousand of folks are without power right now. and the big ongoing fear is flooding. it's wednesday, august 29th. >> announcer: from abc news, this is "world news now." good morning, everybody. i'm paula faris. >> i'm rob nelson. hurricane isaac spun ashore as a category 1 storm. now it is unleashing torrential rains giving the rebuilt levees of new orleans their first major test since katrina hit seven years ago today. we have extensive coverage. a date everyone in new orleans, on the gulf coast, august 29th. the cruel irony of going through this on this anniversary date for all of those folks on the