Forecasters can predict when they believe tornadoes may form with radar research in severe storms. Tornadoes can be extremely devasting ripping through towns and occuring very quickly sometimes with little warning.

Hurricanes can cause extreme destruction. Hurricane forecasters are trying to develop ways to improve forecasting a storm's intensity and path.

Hank explains how tropical storms occur and goes in to depth about the Great Lakes Tropical Storm of 1996, Hurricane Huron.

Landslides can occur without warning. Landslides are events when mountainsides fails and slide down bringing with it mud and debris to engulf the land below. Geologists are studying landslides to find out what causes these catastrophic events without warning.

Clark and his family head for cover as a huge tornado destroys everything in its path. Jonathan sacrifices himself to save the family dog.