Tropical Storm Isaac is heading through the Gulf of Mexico towards New Orleans, Louisiana. Some meteorologists have predicted Isaac could make landfall as a category 2 hurricane on the seventh anniversary of Hurricane Katrina. Hurricane Katrina was the most expensive natural disaster to hit America.

Tropical Storm Isaac, already caused the Republication Party convention in Florida to be delayed a day.

Isaac has already killed at least 20 people in Haiti and the Dominican Republic, and has caused oil production in the Gulf to be halted.