New research shows that older people are especially at risk during and after natural disasters, and may need medical help or other support well after relief operations end.
More tornadoes occur in the United States than in any other country, mainly in the Great Plains, the Midwest and southern states. Two meteorology professors explain what causes these dangerous storms.
Disaster preparations often focus on gear and logistics, but research in Japan after the 2011 earthquake and tsunami shows that strong social ties played a key role in helping communities rebound.
Batten down the hatches. These are nature's nuclear weapons.