Philippine officials on Thursday said the death toll from widespread flooding and devastation caused by Typhoon Kalmaegi in the country’s central region has risen to at least 114 with 127 people reported missing, many of them in a hard-hit province still recovering from a deadly earthquake.

Most of the deaths were reported in the central province of Cebu, which was pummeled by Kalmaegi on Tuesday, setting off flash floods and causing a river and other waterways to overflow, said Bernardo Rafaelito Alejandro IV, deputy administrator of the Office of Civil Defense.

Kalmaegi moved away from western Palawan province into the South China Sea before noon Wednesday and was barreling toward Vietnam, according to forecasters.

Among the dead were six people who were killed when a Philippine air force helicopter crashed in the southern province of Agusan del Sur on Tuesday. The crew was on its way to provide humanitarian help to provinces battered by Kalmaegi, the military said. It did not give the cause of the crash.

Provincial officials said Kalmaegi set off flash floods and caused a river and other waterways to swell. The resulting flooding engulfed residential communities, forcing residents to climb on their roofs, where they desperately pleaded to be rescued as the floodwaters rose, officials said.

At least 71 people died in Cebu, mostly due to drownings, 65 others were reported missing and 69 injured, the Office of Civil Defense said.

It added that 62 others were reported missing in the central province of Negros Occidental, which is located near Cebu.

“We did everything we can for the typhoon but, you know, there are really some unexpected things like flash floods,” Cebu Gov Pamela Baricuatro told The Associated Press.

Caloy Ramirez, a volunteer rescuer, said the massive flooding set off by the typhoon turned an upscale riverside residential community in Cebu city on Tuesday into an unrecognisable scene of tumbled SUVs and houses in disarray.

Residents said floodwater engulfed the first floors of their houses in just a few minutes, sending them scrambling to upper floors or roofs in panic.

“We always expect the worst and what I saw yesterday was the worst,” Ramirez said. He described how the faces of desperate residents would light up when they realised they were being rescued.

The problems may have been made worse by years of quarrying that caused clogging of nearby rivers, which overflowed, and substandard flood control projects in Cebu province, Baricuatro said.

A corruption scandal involving substandard or non-existent flood control projects across the Philippines has sparked public outrage and street protests in recent months.

Cebu, a bustling province of more than 2.4 million people, declared a state of calamity to allow authorities to disburse emergency funds more rapidly. (AP)