The most severe impacts are expected in the southeastern United States, where Bertha's moisture plume is intensifying rainfall along a cold front. A Level 3 of 4 flood risk is in place for parts of the Virginia-North Carolina border through Friday morning, while a Level 2 of 4 risk extends from coastal North Carolina to northern Georgia and Alabama. Urban areas like Atlanta, Birmingham, and Charlotte are particularly vulnerable to flash flooding due to high rainfall rates. In Texas, isolated flash flooding is possible, with rainfall totals of 2 to 4 inches and localized amounts up to 6 inches along the Gulf Coast. Dry ground conditions in South Texas may mitigate the flood threat somewhat.