Among the natural risks that we don't think about too much in the U.S. are volcanoes.

Sure, we all know about Mt. Saint Helens in Washington, and the lingering eruption risks along the West Coast, but for most of us volcanoes are something that happen “somewhere else” that present little direct risk to our lives and livelihoods. (Except for the occasional eruption in Iceland that diverts air traffic into Europe. How annoying.)

Truth is, most of us are wrong.

Recent rumblings around Yellowstone National Park in Wyoming have raised concerns that the local supervolcano (like a sharknado, but a real thing that in no way involves sharks) could be waking from its slumber, and increased eruption on the island of Hawaii forced a number of local residents from their homes last month.

The risks are real, experts says, and we may be dealing with them more and more in the future.

But where are the risks highest? Business Insider took a look at the 18 volcanoes that are ranked as “very high threats” by the United States Geological Survey's Volcano Hazards Program, presenting them in no particular order.

Spoiler alert: Alaska features heavily.

Click to see the volcanoes at Business Insider.

Special Reports /

Meet America's 18 'very high risk' volcanoes

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