Volcanoes: Why are they dangerous?

           Why is a volcano arguable more dangerous then any other storm? because you can survive a tornado, hurricane, etc, but if you get caught in a volcanic eruption their is a really good chance you could die. Scientist are pretty good at predicting when a volcano is going to happen. Even if you escape the eruption, you still have to worry about property damage. Even when your house isn't damaged, the atmosphere is still filled with volcanic ash.
           Why does a volcano erupt? A volcano eruption is caused by being on plates of the earths crust. Then rocks deep in the earth's core causing magma to form and rise through the vents of a volcano causing a big explosion or not.
          
         Hawaii wouldn't be even close to how it looks now if it wasn't for volcanoes. What I mean by this is lava erupts then when it hits the ocean it forms new land masses for Hawaii. This has occurred for the islands for century's.
          I wanted to remind people about volcanoes because I think that most people have forgotten how dangerous they can be. Their has not been a big volcanic eruption in the last couple of years. Even if people say it's not active doesn't mean that it cannot also explode.