In the shadow of Washington State's Mount Rainier, about 90,000 people live in the path of a potential large lahar—a destructive, fluid and fast-moving debris flow associated with volcanic slopes. At ...

So you’ve survived the explosive blast, the lava bombs, the pyroclastic flows and the lava that’s oozed dramatically down the slopes of the volcano. The ash has settled, the mountain’s gone quiet, and ...

Lahars are some of the most dangerous natural events connected to our Cascade volcanoes, destructive volcanic mudflows that can slam communities far from the mountains. “Some people sometimes get ...

Mount Rainier is America's most dangerous volcano. Scientists warn lahars could devastate 150,000 people with little warning.

SEATTLE — Editor's note: The above video on the USGS adding more lahar detection sites at Mount Rainier National Park originally aired June 8, 2021. SEATTLE - Western Washington is virtually ...

The views of Mt. Rainier from the Seattle-Tacoma area are spectacular, but new models show how dangerous this Cascade volcano can be. A question I get asked a lot (and I mean a lot) is what I think ...