Digging for dead bodies, caring for hundreds upon hundreds of injured people, and delivering necessities to thousands of survivors. More than 600 victims from Saturday's earthquake have already been found.
Hundreds more remain buried under landslides and crumbled homes.
Thousands of houses were destroyed by landslides that obliterated entire neighborhoods. Some reports said that as many as 4,000 could still be missing. No part of the country was untouched. Fortunately, there's been a strong response from other nations, international agencies and nongovernmental groups. In the city of Santa Tecla, residents and environmentalists went to court several years ago to stop home-building on a steep slope overlooking the neighborhood of Las Colinas.