More than three quarters of the U.S. Midlands continue to face severe drought conditions, despite heavy rain from tropical storm Isaac.
Exceptional drought - the most extreme category on the U.S. Drought Monitor - persists in parts of Nebraska, Texas, Missouri, Arkansas, Georgia and the Mississippi Valley.
"For the most part, Isaac hit east of the drought," explains Mark Robinson, a meteorologist at The Weather Network.
"While the storm dropped a lot of rain, it all happened in one shot. A drought is best brought under control by rain over an extended period of time."
According to FEMA, drought remains one of the costliest natural disasters in the U.S., racking up between $6 to $8 billion in damages each year.
It's been a scorching summer for the U.S. Midlands -- with the first eight months of 2012 being the hottest the region has ever seen.
With files from Reuters and the USGS