A storm system sweeping over large areas of the U.S. South and Midwest resulted in at least 16 weather-related deaths by early Sunday, with overnight tornado and flash flood warnings setting up more severe weather that forecasters say could cause rising waterways for days to come.

Another round of torrential rain and flash flooding has come for parts of the South and Midwest already heavily waterlogged by days of deadly storms.

There is a Level 2 out of 5 risk for severe weather on Sunday in the areas in yellow. Scattered severe storms will be possible today as a cold front pushes east. Forecasters are also concerned about the threat for flash flooding. Storm Prediction Center