Two of probably the most probably harmful are Mount St. Helens, north of the Portland, Ore., metro space, and 14,000-foot Mount Rainier, which is seen from Seattle and Tacoma.
The continued eruptions have given scientists fears the Pacific "Ring of Fire" could follow suit, producing a mega-eruption that could destroy much of the west coast of America.
The West Coast is house to an 800-mile chain of 13 volcanoes, from Washington state's Mount Baker to California's Lassen Peak.
The West Coast volcanoes include Mount St. Helens, whose spectacular 1980 eruption in the Pacific Northwest killed dozens of people and sent volcanic ash across the country, and massive Mount Rainier, which towers above the Seattle metro area.
The peaks are part of the "Ring of Fire", volcanoes that sit on tectonic plates.
'There's lots of anxiety out there, ' said Liz Westby, geologist at the U.S. Geological Survey Cascades Volcano Observatory in Vancouver, Washington, in the shadow of Mount St. Helens. "They see destruction, and other people get nervous".
A total of 450 volcanoes rest along the ring, following the coasts of South America, North America, eastern Asia, Australia and New Zealand.
The ring is well known for its volcanic activity as numerous volcanoes rest along fault lines of the shifting tectonic plates deep beneath the surface.
Outside of Hawaii, America's most unsafe volcanoes are all part of the Ring of Fire, according to the US Geological Survey.
They include: Mount St. Helens and Mount Rainier in Washington; Mount Hood and South Sister in OR; and Mount Shasta and Lassen Volcanic Center in California. But experts say an eruption in Hawaii doesn't necessarily signal danger on the West Coast.
"These are isolated systems", Westby said.
No eruption seems imminent, experts say.
The Cascades Volcano Observatory monitors volcanoes in the Pacific Northwest and posts weekly status reports.
"All our mountains are thought of lively and, geologically talking, issues appear to occur within the Northwest about each 100 years", stated John Ufford, preparedness supervisor for the Washington Emergency Administration Division. "It's an inexact timeline".
Mount St Helens emits a small, steady cloud of steam at dusk in Washington state.
A lahar warning siren near Orting Middle School in Orting, Washington, which would sound if nearby Mount Rainier erupts or triggers a lahar mud flow.
"Lava will not be the hazard, per se, like in Hawaii", stated Ian Lange, a retired College of Montana geology professor.
But they can produce huge clouds of choking ash and send deadly mudslides into rivers and streams.
The connected volcanoes have a long history of volcanic activity and the recent eruptions in Kilauea have caused fears that a chain-reaction of eruptions could fire off along the ring.
The closest settlement to a West Coast volcano could also be Authorities Camp, on Oregon's Mount Hood.
But Lange believes California's Mount Shasta is the most unsafe, in part because it is surrounded by towns.
The town of Mt. Shasta has numerous response plans for emergencies, including a volcano eruption, Police Chief Parish Cross said. However the plan for a volcano is fairly fluid, he stated.
"We do not know the dimensions or scope of the occasion", Cross stated, together with which route the eruption would happen.
This isn't a difficulty in Orting, Wash., about 20 miles west of Mount Rainier. "We want a fast approach off the valley flooring".
Orting is the city most weak to lahar harm from Mount Rainier, in line with the U.S. Geological Survey.
Scientists say that within the worst case, a 30-foot-high lahar with the consistency of moist concrete may rumble by way of Orting at 50 miles per hour if volcanic exercise abruptly melted snow and ice on Rainier.