The storm poses a significant flooding risk, with coastal areas of Louisiana and Alabama expected to experience storm surges of up to 3 feet (1 meter). Rainfall amounts of 1-4 inches (3-10 cm) are forecast, with some isolated areas potentially receiving higher totals. Beaches, parks, piers, and low-lying roads have been closed in preparation for the storm. Louisiana state climatologist Jay Grymes noted that while Bertha is expected to weaken quickly after moving inland, localized flooding remains a concern. Additionally, the National Weather Service highlighted an unusual overlap of tropical storm and extreme heat warnings in southern Louisiana, a rare weather combination.