Photo taken on Aug. 28, 2017 shows the water from the Barker reservoir flooding into a park, west of Houston, Texas, the United States. Three dams in Houston area began to release water Monday morning due to a dramatic rise in the water level brought by Tropical Storm Harvey. Officials said the decision to release water from overfilled reservoirs is to avoid a collapse of the reservoirs' dam. (Xinhua/Liu Liwei)