The primary risk associated with Tropical Storm Arthur is widespread, life-threatening flash flooding due to prolonged heavy rainfall. Areas across Texas, Louisiana, Mississippi, Alabama, Georgia, and the Florida Panhandle are particularly vulnerable, with rainfall rates reaching up to 3 inches per hour in some locations. Tornado warnings have been issued, and power outages are already affecting thousands of homes and businesses. Coastal regions face dangerous surf and rip currents, while inland areas may experience property damage and travel disruptions. The National Weather Service has issued a High Risk for Excessive Rainfall for parts of the Central Gulf Coast, emphasizing the severity of the situation.