floodwaters menacing millions of people from the dakotas into the deep south. >> flood warnings and watches in 19 states this morning. storms that swamped texas and tennessee moves east today. bringing soaking rain from the southeast all the way up to philadelphia. abc's larry jacobs shows us who has been the hardest hit so far. >> water is just pouring into the street! >> reporter: houston got hit hard. >> there's got to be, like, three feet of water in the parking lot! >> reporter: severe storms brought heavy rains, hail, and winds, knocking out power to thousands of people. look w...