Gerald Herbert / AP
Utility poles are heavily damaged in the aftermath of Isaac as Louisiana Gov. Bobby Jindal's motorcade passes through Grad Isle, La., Friday, Aug. 31. Isaac is now a tropical depression, with the center on track to cross Arkansas on Friday and southern Missouri on Friday night, spreading rain through the regions.
David J. Phillip / AP
This aerial photo shows boats washed up on a road in Yscloskey, La., Friday, Aug. 31.
NBC News staff and wire reports: Hundreds of thousands of people in Louisiana on Friday suffered in humid heat due to power outages caused by Isaac, while tornado alerts were issued for five other states as the system moved slowly into the central U.S.
By Friday afternoon, two tornadoes were reported in southwest Illinois, with minimal damage. Watches were also issued for parts of Arkansas, Kentucky, Missouri and Tennessee. Read more
Eric Gay / AP
Communities damaged and flooded by Isaac get food aid and a visit from a presidential nominee as they start to mop up