Well, search and rescue operations are moving forward, but not without complications. Our correspondent Tony Cheng in Jakarta has more on some of the challenges facing responders.

It's from the air that you get a full view of the devastation in Palu. The coastal city, the largest in the area rocked by the earthquake was then hit by a tsunami. Waves of six meters high washed over the beach, into the city, taking everything in their path. On Sunday, the official death toll more than doubled to 832. The airport in Palu has now re-opened for planes involved in the search and rescue.

Many of the walking wounded are trying to get out, hospitals are overflowing and medical supplies running short. The trauma of the disaster compounded by more than 200 aftershocks. And logistics are a huge obstacle too. Electricity is only intermittent, and many roads into Palu remain blocked. And many remain trapped under the rubble. Rescue workers struggling to find survivors after voices were heard in the rubble of the Roa Roa hotel. Indonesia's President flew to Palu on Sunday, to marshal the rescue teams. But officials say they fear the number of fatalities will climb into the thousands. The nations disaster response center briefed journalists on the rising number of dead. And nearly seventeen thousand evacuees. But these numbers are only for Palu city and as they expand their operations it may be much worse.

TONY CHENG JAKARTA "What is the biggest challenge facing rescue operations?"

SUTOPO PURWO NUGROHO, SPOKESMAN NATIONAL AGENCY FOR DISASTER MANAGEMENT "The impact area is very huge. The area and the size. Limited communication, limited electricity, so this is the biggest (problem)."

TONY CHENG JAKARTA "Here in Indonesia's disaster response center, things are relatively organized and ordered. But this is a very long way away from Palu city and Sulawesi, and only now if the full impact of this earthquake and Tsunami being felt. Tony Cheng CGTN Jakarta."