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About 1900 volcanoes on Earth are considered active. This means they show some level of activity and are likely to explode again. Almost 90 percent of volcanoes are within the Ring of Fire along the edges of the Pacific Ocean. Most active volcanoes in the United States are found mainly in Alaska, Hawaii, Oregon and Washington.

The following resources from U.S. Government agencies and nonprofit organizations can help you deal with a volcanic emergency.

Information on general preparation and recovery, health issues and environmental impacts
(Environmental Protection Agency)
What to Do During a Volcanic Eruption
Advice on what to do if a volcano erupts where you live
What to Do Before, During and After a Volcano
Information fact sheets on what to do before, during and after an eruption
(American Red Cross)
Key Facts About Protecting Yourself After a Volcanic Eruption
A fact sheet on what to do to protect yourself and family after an eruption
(Centers for Disease Control)
How to Deal with Volcanic Ash
How to reduce the effects of ash and make clean-up easier
(U.S. Geological Survey)

Volcanic eruptions may result in other disasters such as flooding, landslides and mudslides, and wildfires.

Mt. St. Helens, WA, May 18, 1980 erupting
Mt. St. Helens, WA, May 18, 1980 -- Disasters are devastating to the natural and man-made environment. (NOAA News Photo)