British Geological Survey scientists said on February 12 that they expect flooding to persist across Britain as rain continues to soak through the soil, building up groundwater. Flooding may persist for up to two months even though the rain has let down. The rain percolates through the cracks and pores of chalk, build up the groundwater stores. The water table can then rise through ground surfaces, causing a flood. The Environmental Agency has already issued groundwater flood warnings for many of the southern counties. — Reuters