How the U.S. heat dome is driving historic flooding in the Midwest

An expanding heat dome that’s threatening much of the Lower 48 from the Central Plains eastward is also driving “major to historic” flooding in the Midwest, per the National Weather Service.The big picture: Flood warnings were in effect across the upper Midwest over the weekend for portions of Illinois, Minnesota, Wisconsin, Nebraska and Iowa due to the extreme weather that’s killed at least one person and resulted in multiple water rescues across the region.In the early morning hours Saturday, SCFR’s USAR @iowataskforce1 deployed to Rock Valley, Iowa to assist in evacuating the town due…