Cyclone Nargis swept into Burma on Saturday 3 May 2008, killing thousands and causing widespread damage.
Nasa satellite images below vividly demonstrate the scale of the impact. The top image was taken before the cyclone hit, with land and water features sharply defined. The lower image shows the aftermath on 5 May, with much of the Irrawaddy river delta region clearly flooded.
Use the tick box above the top image to see the path of the cyclone overlaid on the images. Yangon is another name for Burma's main city, Rangoon.
The PDF document on the right is a UN map showing the flooded areas in more detail with extra information including the main population centres affected.