Photo taken on Jan. 2, 2010 shows an aerial view of houses inundated by flood in Sao Luís do Paraitinga, about 140 km from Sao Paulo, Brazil, Jan. 2, 2010. At least three houses located in the center of the city weree toppled Saturday morning amidst the flood triggered by the continuous heavy rainfall and some others are at risk of collapse.[Xinhua]