The heavy rainfall poses a significant risk of flash flooding, particularly in low-lying areas across Louisiana, Mississippi, Alabama, and Georgia. Popular cities such as New Orleans and Atlanta could experience 3-5 inches of rain, potentially disrupting daily activities and travel. Coastal areas in the Northeast, including Annapolis, Maryland, are under a Coastal Flood Advisory as storms begin to develop. Millions of residents across the Gulf Coast, Ohio Valley, and potentially the Northeast are in the path of these tropical downpours.