MANILA: Floodwaters reaching more than 4m high swamped thousands of houses in the storm-battered northern Philippines on Tuesday (Nov 19) after rivers overflowed following heavy rain and a dam release . Typhoon Man-yi drenched swaths of the Philippines over the weekend, swelling the Cagayan river and tributaries, and forcing the release of water from Magat Dam. The Cagayan broke its banks, spilling water over already sodden farmland and communities, affecting tens of thousands of people.