Shown just east of Florida, Hurricane Katrina had become a Category One hurricane, the lowest category in the hurricane-strength scale, when NASA's Terra satellite captured this image on August 25, 2005.
The hurricane formed as a tropical depression late on August 23 and developed quickly into a tropical storm by the next morning. The storm weakened as it crossed Florida but rapidly gained strength in the Gulf of Mexico before battering the U.S. Gulf Coast.