090921 – Austell – A home in the 2400 block of Brooks Drive in Austell is submerged in flood water Monday. Most of metro Atlanta was under a flash flood warning Monday morning after a foot or more of rain flooded homes, businesses and roadways. Emergency personnel in at least two counties were busy rescuing residents from high water before daybreak Monday. While the flood warning was posted after midnight for Fulton, DeKalb, Clayton, eastern Cobb, Forsyth and Gwinnett counties, the worst flooding appeared to be in Douglas and Paulding counties, which had been under a flood warning since earlier in the evening. There, National Weather Service radar estimated that as much as 15 inches of rain had fallen since Friday, much of it beginning on Sunday afternoon, when a series of strong storms began training, or following one another, northward through the area. Those storms were still dumping rain across the western suburbs at 4 a.m. The Weather Service said 3 to 7 inches had fallen just since 9 p.m. Sunday from Franklin in west Georgia through Carrollton and Douglasville to Dallas. John Spink, jspink@ajc.com