The mayor of a southern Philippine town that was devastated by a powerful earthquake pleaded Thursday for helicopters to transport food to stave off hunger in several landslide-isolated villages.

The 7.8 magnitude offshore quake, one of the strongest to hit the Philippine archipelago in a half century, struck Monday off the southern province of Sarangani and has left at least 47 people dead and injured 688 with 31 still missing.

More than 45,000 people remained displaced, about half in emergency shelters, after the quake damaged more than 12,600 houses in farming towns and cities. Many were still too traumatized to return home due to aftershocks, provincial officials said.

Sarangani reported 20 dead from the quake, the highest toll from the affected provinces, mostly due to a landslide that buried houses in the coastal town of Glan, according to the government’s Office of Civil Defense, which deals with major disasters.

Glan Mayor Victor James Yap said power has not been restored to his province and 10 of 31 villages in his town of more than 100,000 people remained inaccessible mostly due to landslides. He asked the government to immediately deploy air force helicopters to deliver food and other aid to the stricken areas.

“We need food and water but it’s difficult to transport them to some of our villages which remain isolated,” Yap told DZMM radio network. “Choppers are needed to transport food because people there are already very hungry.”

A key access road to the town has been reopened and will allow the delivery of fuel as early as Thursday, but the town remained without power and cellphone services were still spotty, according to Yap.

The Office of Civil Defense said more than 26 million pesos ($426,000) worth of food packs, cash and other aid have been provided so far and 180 government and military planes, helicopters, ships and trucks have been deployed to respond to the disaster.

About 3,400 government and military personnel were involved in search efforts for the missing, debris-clearing in roads, damage assessment and other disaster-mitigation work, it said.

President Ferdinand Marcos Jr. on Wednesday visited the hard-hit city of General Santos city, where he inspected damaged hospitals and schools and discussed recovery efforts. He ordered the release of 100 million pesos ($1.6 million) for the repair of the partly collapsed city hall and 50,000 pesos ($820) for the families of each of the victims who died in the quake.

Most of the deaths from the quake were caused by falling debris from collapsed buildings and landslides in Sarangani, the coastal city of General Santos, and the outlying provinces of South Cotabato and Davao Occidental.

Two swimmers drowned and one remained missing off General Santos after being swept out to sea shortly after the quake hit. Waves of up to 1.4 meters (4.6 feet) above tide level were measured in the country’s south and smaller waves washed ashore in Indonesia and Palau and as far away as southern Japan.

The earthquake was one of the strongest to hit the country since an 8.1 magnitude quake and tsunami on Aug. 17, 1976, that killed about 8,000 people.

The Philippines is often hit by earthquakes and volcanic eruptions due to its location on the Pacific “Ring of Fire,” an arc of seismic faults around the ocean.

(AP)