Skip navigation
   Other Topics: A B C D E F G H I J K L M N O P Q R S T U V W XYZ All Topics

Volcanoes

 

 
 

A volcano is a vent in the Earth's crust. Hot rock, steam, poisonous gases, and ash reach the Earth's surface when a volcano erupts. An eruption can also cause earthquakes, mudflows and flash floods, rock falls and landslides, acid rain, fires, and even tsunamis.

Volcanic gas and ash can damage the lungs of small infants, older adults, and people with severe respiratory illnesses. Volcanic ash can affect people hundreds of miles away from the eruption.

Although there are no guarantees of safety during a volcanic eruption, you can take actions to protect yourself. You should have a disaster plan. Being prepared can help reduce fear, anxiety and losses.

Federal Emergency Management Agency

 

 

 
 
Basics Learn More Multimedia & Cool Tools

 

 
Research Reference Shelf For You
  • No links available

 

 

 

Photograph of a volcanic eruption

MEDICAL ENCYCLOPEDIA  

 

  • MedlinePlus links to health information from the National Institutes of Health and other federal government agencies. MedlinePlus also links to health information from non-government Web sites. See our disclaimer about external links and our quality guidelines.

 

 

 

MedlinePlus links to health information from the National Institutes of Health and other federal government agencies. MedlinePlus also links to health information from non-government Web sites. See our disclaimer about external links and our quality guidelines.