warning signs earlier most of the population had already left, many of them heading for safety in neighboring rwandae, clutching a few meager belongings, this involved a long and hazardous trek across the still smouldering ash and lava. nevertheless 45 people died, either from carbon dioxide poisoning or through being crushed by falling buildings. as the lava swept through the city, it set fire to countless homes and other buildings, adding to the chaos by hurling blazing oil drums high into the air. by the time the danger had passed, 4500 buildings had been destroyed and 120,000 people left homeless. the eruption of mount nyiagongo is believed to have been the most destructive volcano in recent times. since the nature of volcanoes was first understood, they have long been the subject of intense study. there is no longer any mystery about how they were formed; how they vary from type to type and what causes them to erupt. however, even though there have been enormous strides forward in recent years, predicting when and where a volcano will next erupt is still far from being an in fact, most of the s