Helens eruptions, lahars flowed up to 60 miles destroying 200 homes. Lahars are one of the risks with a Mount Rainier eruption, so many foothill communities prepare. "There's a lahar evacuation ...

Experts believe an eruption from Mount Rainier would post a grave threat to millions of people who live in the southern and eastern sections of the Seattle metropolitan area. "One of the main hazards ...

ranked as second most hazardous before Mount Rainier in third place. Lahars typically occur during volcanic eruptions but also can be caused by landslides and earthquakes. Geologists have found ...