Volcanic eruptions can hurl hot rocks for at least 20 miles. Floods, airborne ash, or noxious fumes can spread 100 miles or more. If you live near a known volcano, active or dormant, be ready to evacuate at a moment’s notice. Learn about your community warning systems.
Be prepared for these disasters that can be spawned by volcanoes.
Landslides and mudflows
During a Volcanic Eruption
Avoid areas downwind of the volcano.
Close all windows, doors, and dampers.
Put all machinery inside a garage or barn.
Bring animals and livestock into closed shelters.
Seek shelter indoors.
If caught in a rock fall, roll into a ball to protect the head.
Avoid low-lying areas where poisonous gases can collect and flash floods can be most dangerous.
If caught near a stream, beware of mudflows.
Wear long sleeved shirts and pants.
Use goggles to protect eyes.
Use a dust-mask or hold a damp cloth over the face to help breathing.
Keep car or truck engines off.
Stay out of the area. A lateral blast of a volcano can travel many miles from the mountain. Trying to watch an erupting volcano is a deadly idea.
Mudflows are powerful “rivers” of mud that can move faster than people can walk or run. Mudflows occur when rain falls through ash-carrying clouds or when rivers are dammed during an eruption. They are most dangerous close to stream channels. When you approach a bridge, first look upstream. If a mudflow ls approaching or moving beneath the bridge, do not cross the bridge. The power of the mudflow can destroy a bridge very quickly.