The flash flooding is affecting over 437,000 residents within the warning area, including critical infrastructure such as 14 hospitals and 55 schools. Urban areas with poor drainage are particularly vulnerable, with streets, underpasses, and low-lying neighborhoods already inundated. The slow-moving storm system is expected to exacerbate the situation, increasing the risk of dangerous runoff in densely paved areas. Authorities have emphasized that most flood-related fatalities occur in vehicles, urging drivers to avoid flooded roadways.