The heavy rainfall poses a risk of flash flooding, particularly in low-lying areas, poor-drainage locations, underpasses, and neighborhoods with a history of flooding. Streets and drainage systems may become overwhelmed, leading to ponding and hazardous travel conditions. Residents in basement apartments or below-grade dwellings are especially vulnerable and are advised to seek safer accommodations. The heaviest rain is expected between 5 a.m. and 10 a.m., coinciding with early morning travel hours.