On August 12, 1996, Folkestone was hit by a massive summer thunderstorm which dropped two months rainfall on the town in the space of just two hours. Flood waters were two metres deep in places, and the emergency services rescued people from upper windows by boat. Reporter Rhys Griffiths looks back on those events, and learns why authorities are urging people to be prepared for flooding in the future… The first sign of the impending deluge was the water streaming under the back door. Amada Halstead, 31 at the time and pregnant with her fifth child, was at home in Black Bull Road with her husba…