Millions across the Northeast and Mid-Atlantic remain under flash flood warnings early Tuesday as slow-moving summer storms bring heavy showers to the East Coast, impacting transportation and leaving people stranded in vehicles on waterlogged roads.

Torrential rain and thunderstorms are expected to threaten much of the eastern and central United States with flash flooding throughout the rest of this week, forecasters warned, as parts of the country,

Forecasters warned more rain and flash flood risk is expected on July 15 after storms flooded out roads the day before.