Welcome to the programme. More than a thousand people have been rescued from flooding in one of americas most populous cities houston, in texas as a huge storm continues to batter parts of the state. Forecasters there say the conditions are unprecedented, and warn the waters are still rising. The white house has announced that President Trump will visit the region on tuesday. Our north america correspondent james cook reports from houston. Harvey arrived in houston with a vengeance. No longer packing the full force of a hurricane, but still deadly. Forecasters said it is on track to dump 50 centimetres. Injust21i hours, more than two feet of rain fell on the fourth largest city in the United States. The results are devastating. This appears to be either the worst or one of the worst floods houston has ever had. We are measuring not in inches, but in feet. Hundreds of rescuers are taking to the waters in boats large and small. But the flooded city street are difficult to navigate. The c