Many more are waiting to be served. Private citizens now using their own boats to ferry trap residents to safety. Two feet of rain has already fallen and that could double in the next few days. Tropical storm harvey has barely moved since slamming to shore as a hurricane, and may become even stronger. How much worse could it get . And president ial response. Calling the flooding, quote, historic, President Trump will visit texas tomorrow, says he may travel saturday to louisiana where he has also declared a federal emergency. At the same time hes caught up in a new controversy, defending his decision to pardon former sheriff joseph arpaio. Wolf blitzer is off today. Im jim sciutto, a orksciutto, the situation room. Announcer this is cnn breaking news. The breaking news, desperate rescue operations are under way at this moment in houston where epic, devastating flooding has put much of americas fourth largest city under water. It is a race against time as some areas in the south texas d