| Hurricane | Tornado | Volcano | Tsunami | El Nino | |
| Flood | Drought | Fire | Meteor |
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- The National Drought Mitigation Center helps people and institutions develop and implement measures to reduce societal vulnerability to drought. The NDMC, based at the University of Nebraska-Lincoln, stresses preparation and risk management rather than crisis management. (http://enso.unl.edu/ndmc/ )
- Take a look at the cycles of drought and flood caused by the periodic warming of the Pacific Ocean. Learn how wind and water drive El Nino. (http://www.nationalgeographic.com/elnino/)
- The Dust Bowl. Great drought of the 1930's. Photos and text. (http://www.gpc.edu/~pgore/students/w97/tanyacox/dustbowl.htm)
- - Drought Monitor. NOAA. Links to dozens of drought sites.Most have charts or maps, some interactive. (http://www.drought.unl.edu/index.htm)
- U.S. drought map. Changed weekly. (http://www.drought.unl.edu/dm/monitor.html)
- Threat assessment for the month. (http://www.cpc.ncep.noaa.gov/products/expert_assessment/drought_assessment.html)
- How much rain does an area need to end existing drought? Updated regularly. (http://www.ncdc.noaa.gov/ol/climate/research/drought/drought.html)
- Palmer drought severity index map. (http://www.cpc.ncep.noaa.gov/products/analysis_monitoring/regional_monitoring/palmer.gif)
- Explaining the Palmer drought severity index. (http://www.drought.noaa.gov/palmer.html)
- Normal monthly precipitation (rain) for all U.S. locations. (http://www.ncdc.noaa.gov/ol/climate/online/ccd/nrmlprcp.html)
- Make a graph of rainfall, temperature and drought conditions for any state, any year from 1985 to present. (http://www.ncdc.noaa.gov/onlineprod/drought/main.html)
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| Hurricane | Tornado | Volcano | Tsunami | El Nino | |
| Flood | Drought | Fire | Meteor |
Modified June 13, 2006