VOLCANOES:A volcano is a mountain that opens downward to a reservoir of molten rock below the surface of the earth. Unlike most mountains, which are pushed up from below, volcanoes are vents through which molten rock escapes to the earth's surface. When pressure from gases within the molten rock becomes too great, an eruption occurs. Eruption can be quiet or explosive. There may be uava flows, flattened landscapes, poisonous gases, and flying rock and ash that can sometimes travel hundreds of miles downwind. WILDFIRES:Wildfires often begin unnoticed. These fires are usually triggered by lighting or accidents. They spread quickly, igniting brush, trees, and homes These destructive natural phenomena happen in a sudden way without exact warning, so some of