In April 2008 , the Nevado del Huila volcano erupted , and thousands were evacuated . Volcanologists were worried that this could be another `` Nevado del Ruiz '' . When another Colombian volcano , the Nevado del Huila , erupted in April 2008 , thousands of people were evacuated because volcanologists worried that the eruption could be another `` Nevado del Ruiz '' .