Natural Hazards

You might also want to look at other subjects listed above such as Earthquakes and Volcanoes.

Two general beginning web sites:

US Geological Survey Natural Hazards Gateway
This is a gateway to USGS information on Earthquakes, Floods, Hurricanes, Landslides, Tsunamis, Volcanoes, and Wildfires.

FEMA Disaster Information
Information on different types of disasters and hazards.