Incoming rounds of heavy rain and thunderstorms trigger midweek flash flood threat across the East Coast

Millions of people across the Northeast and Ohio Valley face a flash flood risk through Sunday as oppressive humidity fuels rounds of daily thunderstorms across the already waterlogged region. DAYS OF RELENTLESS HEAVY RAIN PROMPT FLASH FLOOD THREATS FOR MILLIONS ACROSS ALREADY SATURATED MIDWEST, PLAINSThe cold front that brought heavy rain and flooding across the Midwest is slowly shifting east. This graphic shows the East Coast flash flood threat. (FOX Weather)Washington, D.C. and New York City are also included in this flood risk. Albany, New York, has recorded more than 5 inches of rain above average this summer, following a Flash Flood Emergency that swamped parts of the state's Capital Region last week.