Why is Mount Rainier considered as the most dangerous volcano?

Although Mount Rainier has not produced a significant eruption in the past 500 years, it is potentially the most dangerous volcano in the Cascade Range because of its great height, frequent earthquakes, active hydrothermal system, and extensive glacier mantle. read more

Mount Rainier's most far-reaching and therefore most dangerous threats derive not from landslides and glacial outburst floods but from its volcanism. As with most volcanoes, the mountain’s past behavior gives a preview to its future hazards. read more

Although most large landslides at Mount Rainier occurred during eruptive periods and were probably triggered by magma intrusion or by explosive eruptions rocking the volcano, the origin of at least one, the 500-year-old Electron lahar, may not be related to eruptions. read more

But Mount St. Helens is not even the most dangerous volcano in the state of Washington. If Mount Rainier were to erupt with the same force that Mount St. Helens erupted in 1980, the loss of life would be far, far greater. read more