Aerials of floods in the Philippines after typhoon

At least 42 people have been killed after a typhoon in large parts of a northern Philippines province caused extensive flooding, officials.

Troops, police, coast guard and disaster-response teams rescued tens of thousands of people, including many who flooded radio and TV networks, and social media with desperate pleas for help.

Footage released by the Philippine Coast Guard showed extensive flooding in the Cagayan Valley region, with people being rescued from fast-flowing floodwater, and the Magat Dam releasing water in the Isabela Province region.

Floodwaters receded and the weather cleared in many areas after Typhoon Vamco blew out into the South China Sea on Friday, but the military said it was still rescuing people trapped in some flooded communities.

The national police reported that the death toll had risen to at least 42 with 20 missings.

Among the dead were at least 12 villagers who were dug out from mud and rockslides in the northern provinces of Cagayan and Nueva Vizcaya, police said.