On November 13, 1985 Nevado del Ruiz in Colombia had a small eruption. But the intense heat caused huge amounts of ice to melt and form fast moving lahars of rocks and mud that wiped out whole villages and killed more than 25,000 people. As tragic as that was, the real danger to Venezuela would be a volcano that explodes UPWARD. The eruption of Huaynaputino in Peru in 1600 changed the climate all over Planet Earth.