The primary risks include widespread and locally catastrophic flooding across the southern U.S., particularly in Texas, Louisiana, and Mississippi. A Level 3 out of 4 flood threat has been issued through Thursday, with the potential for life-threatening flash floods. Emergency rescues have already been reported in Texas, where first responders aided residents trapped by rising waters. The combination of tropical moisture and a stalled cold front is expected to exacerbate the situation, with slow-moving thunderstorms increasing the risk of prolonged flooding.