
In addition to spewing out flows of lava and hot ash, volcanic eruptions can also trigger dangerous mudslides, avalanches, tsunamis, flash floods, and earthquakes. They can even affect global climate. Lava flows are serious fire hazards due to their intense heat. Volcanic ash, made of pulverized rock, can be dangerous if inhaled by infants, the elderly, and people with respiratory illnesses.
Of the 169 volcanoes in America, 18 of them have been designated as "Very High Threat Volcanoes" by the USGS. Most of these volcanoes are found in Alaska, Hawaii, and the Cascade range in Washington and Oregon. Although the ones in the Cascades erupt less frequently than those in Hawaii, they are more violent when they do blow and more dangerous due to their proximity to populated areas.
If you live near a volcano, whether active or dormant, you should be ready to evacuate at a moment's notice. Have a Classroom Emergency Plan in place, and make sure your Emergency Supply Kit includes a breathing mask and goggles for each member of your classroom.