Doctors had to set up tents to treat patients on Tuesday. In the scorching sun, a young woman gave birth outdoors.
The earthquake, measured at magnitude 7.8, is the most powerful to hit the Philippines in 50 years and has forced more than 20,000 people to flee their homes. In total, at least 41 people have died and about 450 people have been injured.
"There are still aftershocks, so rescue workers are being very cautious. It's a challenge," said regional civil defense chief Rodrigo Sosmena.
Some communities are expected to be cut off for at least a week due to damage to roads and bridges.
