Janai Norman reports from North Plainfield, New Jersey, where two people died after flash floods struck the region on Monday night during rush hour as torrential rain inundated the Northeast, and Ginger Zee tracks the potential tropical system that’s expected to bring heavy rain from Florida to Louisiana through end of the week; Trevor Ault has the latest on the investigation into the "American Idol" producer and her husband who were found shot to death in their Los Angeles home; Matt Gutman