make it? i don t know. reporter: emergency crews are doing the same thing for a nearby school, piling on a six-foot dirt barrier. just one more wall in what s turning into a city of mazes divided by freshly built berms and bracing for the worst. what do you do? you do what you can. you go. reporter: and this is just the beginning. the peak for this river isn t supposed to come till sunday. and by then up to 4,000 homes could be under water. neal karlinsky, abc news, minot, north dakota. another rising river, the missouri, is threatening to flood two nuclear plants in nebraska. parts of the ft. calhoun station near omaha are under water. it was shut down in april for refuelling and operators are not planning to restart it until the water recedes. water s within inches of another plant downriver but it s still operating. incredible. what a mess. taking a look at your weather. gusty winds, hail and also some flooding from nashville, lexington and birmingham all the