Tropical Storm Isaac hasn't hit hurricane strength yet, but it's apparently bearing down on New Orleans almost seven years to the day that Hurricane Katrina hit the region.
Tropical Storm Isaac is emerging from the Haiti coast and forecasters have upped the ante, issuing hurricane warnings and watches through the parts of Florida.
Forecasters say Tropical Storm Isaac is moving westward across the Atlantic on a track that could possibly take it toward Florida, where the Republican National Convention will be held next week.