Books:

1. DEVASTATION! The World's Worst Natural Disasters by Lesley Newson

2. The Atlas of Global Change edited by Lothar Beckel

Websites:

3. http://www.nws.noaa.gov/om/drought.htm

4. http://www.germantown.k12.il.us/html/droughts1.html

5. http://www.drought.unl.edu/kids/