While many of Pittsburgh's underground waterways serve as stormwater and sewer networks, environmentalists and officials see potential in these covert culverts.
than the record level, but it may not be enough in the future. in the old days, we used to put these temporary barriers up here, which used to take hours and hours to put uu dave throup spent 20 years working for the environment agency and now lectures on climate change and flood prevention. the floods we re getting at the moment are getting more and more extreme. we ve been within a half a metre to a metre of the top of all of the flood defences now. so it s only going to take that one big event and then we re going to see significant overtopping of all these flood defences. would you believe that the river has fallen by more than two and a half metres since its peak on friday? luckily, there s no cricket scheduled for a few months yet. the problem is, this is the second big flood this winter and if there s another storm, all this will happen again. worcester has always flooded. these pictures from 1963 to show how little has changed. but the floods are coming more often. we have ne
phil mackie has been to see some of the people caught up in the floods. remember this nick lupton s house surrounded by floods and defended by the wall he built? the film we took last week has been viewed more than 30 million times. today, the house is attached to the mainland again. welcome. glad to see it so dry, at last. yes, dry is good. after being stranded inside for a week, the waters receded and we got to see the defenses close up. you can see previously we had a little bit of damp coming up the wall. oh, it s always a relief when the river goes down. we re into the recovery now. there s a fewjobs to do, even though the wall is keeping it away from the house. during storm henk, a torrent of water began pouring in. but the walls kept it out. nick built his flood wall 30 centimetres higher than the record level, but it may not be enough in the future. in the old days, we used to put these temporary barriers up here, which used to take hours and hours to put up dave throup spe