MANILA (Reuters) - The death toll from the deadliest cyclone to hit the Philippines this year has climbed to 67, with 12 people still missing, the national disaster management agency said on Sunday.President Rodrigo Duterte was scheduled to fly to the northern Tuguegarao province later in the day to assess the situation in Cagayan Valley region, which was heavily flooded after Typhoon Vamco dumped rain over swathes of the main Luzon island, including the capital, metropolitan Manila. Twenty-two fatalities were recorded in Cagayan, 17 in southern Luzon provinces, eight in Metro Manila, and 20 in two other regions, said disaster agency spokesman Mark Timbal. Twenty-one people were injured, he said. Many areas in Cagayan, a rice- and corn-producing region of 1.2 million people, remained submerged as of Sunday, according to media reports. Heavy flooding, caused by the accumulated effects of previous weather disturbances, as well as water from a dam and higher plains affected thousands of families, some of whom had fled to rooftops to escape two-storey high floods. The damage to agricultural commodities due to floods was initially pegged at 1.2 billion pesos ($25 million), while infrastructure damage was estimated at 470 million pesos, Timbal said.