The primary concern for Houston and nearby areas is the potential for flash flooding, particularly in low-lying and flood-prone regions. The National Weather Service's level 2 of 4 flash flood risk indicates a moderate chance of localized flooding, especially in areas receiving higher rainfall totals. Commuters and residents in areas like Harris County should remain vigilant, as heavy rain could lead to hazardous road conditions and localized water accumulation. Outdoor activities planned for Memorial Day may be disrupted by scattered showers and storms, particularly in the morning hours.