The severe weather poses significant risks to over 40 million people across multiple states. Tornadoes, damaging winds, and large hail are possible, with the greatest tornado threat on Monday in northeast Iowa and northern Wisconsin. Flash flooding is a growing concern, especially along the I-95 corridor and in the central Appalachians, where repeated heavy rain could lead to dangerous conditions. By Wednesday, the Carolinas face heightened flooding risks as the cold front slows, increasing the likelihood of waterlogged ground and flash floods.