KEARNEY, Neb. -- Health officials are warning people along flooded Nebraska rivers of bacteria, chemicals, and debris that's coming along with it. Officials say residents who live by the river need to make sure any water sources like private wells have their vents capped and waterproofed as much as possible. If they are underwater, officials say power to them should be shut off. Emergency management officials say flood water coming down the Platte River is slowing, but Buffalo and Hall Counties are still preparing for it to spill over the banks.