Hurricane Harvey is causing one of the worst flood disasters in U.S. history. U.S. emergency management officials said Monday that more than 30,000 people are expected in shelters in the wake of the tropical storm. Parts of the southeast Texas have received more than 30 inches of rain since Thursday evening. Brock Long, Director of the Federal Emergency Management Agency. Meanwhile, forecasters said that the situation is far from being over. The storm is expected to drop 15 to 25 inches of rain over the Texas coast through Friday.