professor liz bentley is a meteorologist and she has been studying how weather patterns have been dramaticallynging. we are seeing climate change, a 1 degree warming over the past hundred years or so has seen a huge increase in rainfall. that will continue as temperatures continue to rise, so we're seeing more rain, heavier rainfall events, build in the topography and the steepness of the valleys, you're only going to see inevitably more extreme flooding. south wales is one of the worst affected areas in the country by storm dennis. two severe flood warnings are in place meaning there is a danger to life. that red alert prompted warning messages to householders who had signed up to receive texts from natural resources wales' floodline system. but in parts of nantgarw, something went wrong. we didn't have any warning. jesusjones! but we are all registered with floodline. no text messages to let us know. if they knew this was going to happen, we could have gone upstairs and maybe salvaged some stuff. susan fraser lives on this street with other members of her family. my mum phoned me about a:30a