Health concerns grow as water recedes: Houston official

A volunteer (R) distributes goods at George Brown Convention Center which has been opened as a shelter in Houston, Texas, the United States, on Aug. 30, 2017. The American Red Cross estimates that more than 17,000 Texans spent Monday night in 45 shelters open across the state, including about 9,000 people at downtown Houston's George Brown Convention Center. (Xinhua/Song Qiong)