Floodwaters submerged hundreds of houses in the northern Philippines on Monday after water released from a dam following Typhoon Man-yi caused a major river to break its banks.

Man-yi was one of the strongest of the six major storms to hit the northern Philippines in less than a month and had sustained winds of up to 195 kilometers (125 miles) per hour when it slammed into the eastern island province of Catanduanes on Saturday night.

A super typhoon ripped through the Philippines’ largest island on Sunday, knocking down houses and sending more than half a million people to emergency shelters, as rare back-to-back storms cause havoc across an exhausted nation.