There is plenty of warning before a volcano erupts. Days or weeks or even months can go by with signs being offered up that a volcano is about to erupt. There may be one or more of all of these signs: Smoke rising, small ground trembles, rumbling noises, a build up of the sides of the volcano, and now more and more, a scientist will issue a warning that an eruption may be forthcoming. There is plenty of time to evacuate the area around and near the volcano if only people will use their eyes & ears. Volcanoes do not just show up over night spewing ash, lava and rocks over the land.