Typhoon Sarika was blasting across the northern Philippines on Sunday and headed toward Vietnam, where at least 15 people have already been killed in flooding caused by days of torrential rain.

The powerful storm, known locally in the Philippines as Karen, had sustained winds of about 130 kilometers per hour (81 miles per hour) and gusts up to 220 kph as it crossed the main island of Luzon, according to the government’s weather agency.

The Associated Press reported at least two people were dead as a result of the storm, which knocked out power, tore the roofs off houses, toppled trees and isolated villages in the heavily agricultural area. About 200 flights have been canceled since Saturday night.

In central Vietnam, a tropical low pressure event last week triggered heavy rain in several coastal provinces, with amounts ranging from 300 to 900 millimeters (1 to 3 feet) over the past three days, the Department of Natural Disaster Prevention and Control said Sunday.

Quang Binh province suffered the heaviest casualties, with nine people, including two children, reported dead, mostly from drowning, the department said. In all, at least 15 people were killed and nine others were missing, it said.

The floods inundated about 100,000 houses and more than 10,000 hectares (25,000 acres) of rice and other crops, and damaged roads and bridges, it said, adding that roads to several villages were cut off.

Local media reports said the floods were the worst in central Vietnam since 2011, when nearly 60 people were killed.

The rain subsided Sunday but officials warned of more floods as Typhoon Sarika heads to the South China Sea after battering the Philippines.

It was forecast to be about 350 kilometers (217 miles) east of the Paracel Islands by Sunday night local time, the department said.

Deputy Prime Minister Trinh Dinh Dung late Saturday called on provinces in central Vietnam to mobilize forces to search for missing people and work out evacuation plans before the typhoon makes landfall.

By Vu Trong Khanh & Cris Larano - The Wall Street Journal - October 16, 2016