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As the seventh anniversary of Hurricane Katrina's landfall approaches, New Orleans -- and much of the Gulf Coast -- is preparing to put into practice the lessons learned from that defining storm. Tropical Storm Isaac is following a path eerily similar to Katrina's in 2005.

Airlines cancelled hundreds of flights as Tropical Storm Isaac lashed southeastern Florida Sunday, with service not expected to resume fully until late Monday. The airports in Miami and Fort Lauderdale were hit the hardest, cancelling 589 flights - the vast majority of the 742 U.S. flights grounded overall because of the storm as of Sunday afternoon, according to the flight-tracking service FlightAware.

All the political attention might be focused on Republicans or even Tropical Storm Isaac, but that's not stopping President Obama from asking for more campaign money. In a new fundraising e-mail today geared to the swing state of Iowa, Obama says he's losing "the air war" and needs $5 or more from donors to pay for more campaign commercials.

The death toll from Tropical Storm Isaac has climbed to nine after authorities in the Dominican Republic reported two deaths Sunday....

Tropical Storm Isaac is likely to be a hurricane when it hits the Florida Keys Sunday, strengthening to a Category 2 as it heads northwards towards the Gulf Coast later.

Delegates began to arrive in Tampa on Sunday as convention organizers said they were still working on a revised schedule after canceling the first day because of the weather. Still, many of Sunday’s events were going ahead as planned.

Tropical Storm Isaac headed toward the Dominican Republic and Haiti on Friday, continuing its march across the Caribbean and prompting Florida officials to urge residents to prepare now.

Air tankers and helicopters flew repeatedly into a deep rim rock canyon to douse the spearhead of a massive wildfire in Northern California and stop it from driving into a nearby mountain community and Lassen Volcanic National Park....

Tropical Storm Isaac's outreach is expected to be felt in Florida by late Sunday night -- just as Mitt Romney , Paul Ryan and the GOP faithful are gathering in Tampa for the Republican National Convention.

California Governor Jerry Brown declared a state of emergency in three Northern California counties on Wednesday after a wildfire that has already destroyed 64 homes advanced with 75-foot flames on a tiny community at the doorstep of a national park.